Youre distributing the power to the inside which gives you x2 + 100, but for factors when it’s raised to any power you can’t do that. You have to multiply (x-10) by (x-10) since it’s to the second power and distribute

You can’t distribute exponents. Instead, use the FOIL method (first-outer-inner-last) when given this form. It usually results in the end product being a quadratic trinomial (three terms with the highest degree being 2) With practise you’ll get faster at it and it’ll be like second nature :-)

2nd power means you multiply these numbers in parenthesis to itself twice, so it is (x-10)(x-10) next you gotta multiple every term by the other ones in other parenthesis, FOIL or whatever you use xx-10x and -10x-10(-10) it gives us x2 (from xx) -20x(from -10x-10x) and +100(from -10(-10) so the final answer is x2 -20x+100

Have you ever heard of the FOIL method? It's the same equation everyone else has commented, but I always remembered it this way, first outter inner last. It helps to write it out like (x-10)(x-10). First terms multiplied gets x2 Inner terms multiplied gets -10x outter terms gets -10x last terms gets 100. Sum that up and you got what you need c:

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Go watch factoring videos by the organic chemistry tutor. If you don’t understand the basic concepts then there is really no point to throw yourself into these problems.

Read the question and thought I was thinking like a genius until I looked at the answers and realized none of them looked even remotely close to what I was thinking

When something is squared like this. It’s multiplying it twice. If you foil you end up with the stuff in the middle. It looks like this (x-10)2 =a2-2ab+b2. It’s strangely formatted sorry bc I’m on a cellphone.

Bro ngl if you are having problems solving this question then you need to back off and take your mind off for 1-2 years from sat since you are in junior year.

small two on top mean double stuff in parentheses

Not double stuff in parentheses, stuff in parentheses multiplied by itself

goo goo gah gah

thank you i got it now

nailed it

It's the expression (a+b)2=a2+2ab+b2

So (a-b)2=a2-2ab+b2

this question uses (a-b)^2=a^2+b^2-2ab

just when i thought i had progress 💔

Youre distributing the power to the inside which gives you x2 + 100, but for factors when it’s raised to any power you can’t do that. You have to multiply (x-10) by (x-10) since it’s to the second power and distribute

(x - 10)2 is not equal to x2 - 102

they have used this formula (a-b)2 = a2 + b2 -2ab

Plug 2 in for x. (2-10)2 is (-8)2, which equals 64. Plug 2 into all of the answers to see which one also equals 64.

You can’t distribute exponents. Instead, use the FOIL method (first-outer-inner-last) when given this form. It usually results in the end product being a quadratic trinomial (three terms with the highest degree being 2) With practise you’ll get faster at it and it’ll be like second nature :-)

YES FOIL

Okay, pay close attention:

thank you!!

2nd power means you multiply these numbers in parenthesis to itself twice, so it is (x-10)(x-10) next you gotta multiple every term by the other ones in other parenthesis, FOIL or whatever you use xx-10x and -10x-10(-10) it gives us x2 (from xx) -20x(from -10x-10x) and +100(from -10(-10) so the final answer is x2 -20x+100

Kido (a-b)² =a² -2ab +b²

No jesse I really wanna does that thing here even work?

Yeah you can’t distribute exponents

(a-b)2= a2 -2ab+b2

you need to foil this: first inner outer last. this can be rewritten as (x-10)(x-10)

Have you ever heard of the FOIL method? It's the same equation everyone else has commented, but I always remembered it this way, first outter inner last. It helps to write it out like (x-10)(x-10). First terms multiplied gets x2 Inner terms multiplied gets -10x outter terms gets -10x last terms gets 100. Sum that up and you got what you need c:

🗿

👰🏻

I'm sorry but how don't you know this 💀

i thought i didn’t but i should’ve been taking a break like normally instead of rushing thru questions

They’re in middle school and this is like 9th 10th grade math

Answer is C

Damn bro what grade are u in

Fell for the classic one

vulnerably

When there's a + or - sign, it's one term so you multiply, divide, square etc. the entire thing.

Me do Box method

box always works even when foil fails

Basicly some fucker form idk where decided this is what we gotta learn. So it makes sense deal with it

true that

Lots of comments, nobody has told you to just plug in x = 1 everywhere. You'll get 81 for the correct answer.

thank you.

lol

A would be correct if it was (x+10)(x-10), as the constants cancel out. 10-10=0x

dawg ru stupid? its fucking alegbra, shit learned in 8th grade.

i was burnt out after 5 hours of studying my brain couldn’t even 😭

Isn't this learned in 7th grade

Reminder: When asking for help with questions from tests or books, please include the source of the question in the post title. Examples of appropriate titles might include "Help with writing question from April 2017 QAS" or "Help with question from Erica Meltzer's grammar book." Posts that do not adhere to this rule are subject to removal. For more information, please see rule #7 in the sidebar.

(X-10)(x-10)

Bro WHOLE SQUARE

don’t yell at me 😫

since others have already answered, just a question, is this a SAT problem?

it’s a practice question from khan academy

Search up the "FOIL method" and watch a video on it

Distributive property

x*x = x2

Your plans have been FOILED

Missing -20x bud

(a-b)2 = a2 - 2ab + b2

You can’t just distribute the square like that you have to FOIL

First, take the numbers in the parenthesis and multiply them against themself, like this:

Foil (x-10) (x-10) and then combine like terms

WELCOME TO THE FOILLL METHOD. 😎😎😎😎😎😎😎👌👌👌👌👌👌👌 MULTIPLY THE FIRST FROM EACH PARENTHESIS

square the first, double the product, square the last

(x - 10)(x - 10)

(a-b)2 = a2 + b2 - 2ab

Go watch factoring videos by the organic chemistry tutor. If you don’t understand the basic concepts then there is really no point to throw yourself into these problems.

It’s just foiling (first, outside, inside, last). It can be rewritten as (x-10)(x-10) and then it would be x2-10x-10x+100 which is x2-20x+100

use (a-b)whole square identity bro

If you still don’t get it, you can pm me and I’ll write it out on a piece of paper and show the work

Read the question and thought I was thinking like a genius until I looked at the answers and realized none of them looked even remotely close to what I was thinking

When something is squared like this. It’s multiplying it twice. If you foil you end up with the stuff in the middle. It looks like this (x-10)2 =a2-2ab+b2. It’s strangely formatted sorry bc I’m on a cellphone.

a = X; b = 10 (a - b)² = a² - 2ab + b². (x - 10)² = x ² - 20x + 100 Goo goo Ga ga

Bro ngl if you are having problems solving this question then you need to back off and take your mind off for 1-2 years from sat since you are in junior year.

i just thought i didn’t know it because i was burnt out from 5h of studying dw i’m not that dumb

(a+b)2=a2+2ab+b2 it's algebra formula

(x-10)(x-10) is the same as (x-10)² with different writing.

(x - 10)(x - 10) =