Пожалуйста ребята помогите упростить выражения!. Created by connors. algebra-ru

Пожалуйста ребята помогите упростить выражения!...

November 2021 1 7 Report

Пожалуйста ребята помогите упростить выражения!

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westnord 1) 2x(x-3) - 3x(x+5) = 2x^2 - 6x - 3x^2 - 15x = -x^2 - 21x = -x(x+21)

2) (a+7)(a-1) + (a-3)^2 = a^2 - a + 7a -7 + a^2 - 6a +9 = 2a^2 + 6a - 7

3) 3 (y+5)^2 -3y^2 = 3 (y^2 + 10y + 25) - 3y^2 = 3y^2 + 30y + 75 - 3y^2 = 30y + 75

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