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Оченыйчел
@Оченыйчел
July 2022
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Помогите пожалуйста) неравенства 8 класс, вариант 2!!!
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Mashunka8
1 задание
a)3(x+1)-2(2-x)>11
3x+3-4+2x-11>0
5x-12>0
x=2,4
б)(x+3)(x-3)<(x+3)^2
x^2-3x+3x-9<x^2+6x+9
x^2-x^2-3x-6x+3x-9-9<0
-6x-18<0
6x+18>0
6x>-18
x>-3
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Answers & Comments
a)3(x+1)-2(2-x)>11
3x+3-4+2x-11>0
5x-12>0
x=2,4
б)(x+3)(x-3)<(x+3)^2
x^2-3x+3x-9<x^2+6x+9
x^2-x^2-3x-6x+3x-9-9<0
-6x-18<0
6x+18>0
6x>-18
x>-3