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stasya211001
@stasya211001
July 2022
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Упростить выражение
a(a+2b)-(a+b)^2
(a-3)(a-7)-2a(3a-5)
(x-2)(x+4)-2x(1+x)
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373050026
A(a+2b)-(a+b)^2=а^2+2ав-(а^2+2ав+в^2)=а^2+2ав-а^2-2ав-в^2=-в^2
(a-3)(a-7)-2a(3a-5)=а^2-7а-3а+21-6а^2+10а=-5а^2+21
(x-2)(x+4)-2x(1+x)=х^2+4х-2х-8-2х-2х^2=-х^2-8
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Answers & Comments
(a-3)(a-7)-2a(3a-5)=а^2-7а-3а+21-6а^2+10а=-5а^2+21
(x-2)(x+4)-2x(1+x)=х^2+4х-2х-8-2х-2х^2=-х^2-8