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Неуч00
@Неуч00
July 2022
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Помогите срочно!!! Алгебра 7 класс
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vladislav4450
#1 1)(2x-3)+(-2x^2-5x-18)=2x-3-2x^2-5x-18=-2x^2-3x-21
2) (14ab-9a^2-3b^2)-(-3a^2+5ab-4b^2)=14ab-9a^2-3b^2+3a^2-5ab+4b^2=-6a^2+b^2+9ab
#2
5x-3-2x+2x^2+7x-17=0
10x-20=0
X=2
#3. 2x^2+2y^2+6xy
#4 acb-bc=bc(a-1)
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Answers & Comments
2) (14ab-9a^2-3b^2)-(-3a^2+5ab-4b^2)=14ab-9a^2-3b^2+3a^2-5ab+4b^2=-6a^2+b^2+9ab
#2
5x-3-2x+2x^2+7x-17=0
10x-20=0
X=2
#3. 2x^2+2y^2+6xy
#4 acb-bc=bc(a-1)