даю 100 балов срочно. Created by dfdfdfa. algebra-ru

даю 100 балов срочно...

MizoriesKun Используем формулы:
(a+b)^2=a^2+2ab+b^2
a^2-b^2=(a-b)(a+b)
решаем:
$a)(x-8)(x+8)+8x^2=x^2-8^2+8x^2=9x^2-64 \\b)(3x+1)(3x+1)-16x=(3x+1)^2-16x=\\=(3x)^2+2*3x*1+1^2-16x=9x^2+6x+1-16x=9x^2-10x+1$

0 votes Thanks 5

AnonimusPro

Verified answer

(х-8)(х+8)+8х²=х²-8²+8х²=9х²-64

(3х+1)(3х+1)-16х= (3х+1)²-16х= 9х²+6х+1-16х=9х²-10х+1

1 votes Thanks 1

Answers & Comments

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