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MrSergey
@MrSergey
July 2022
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5
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Упростить выражение
1)(x^2-1)*3х-(x^2-2)*2x
2)2\3х(3-6х)+4х(х-1)
4)7(4а+3b)-6(5a+7b) при а=2,b=-3
5)3ab(4a^2-b^2)+4ab(b^2-3a^2) при a=10,b=-5
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megabendera
1) (x^2-1)3x-(x^2-2)2x;
3x^3-3x+(-x^2+2)2x;
3x^3-3x-2x^3+4x
Ответ = x^3+x
2)2/3x(3-6x)+4x(x-1)=2/3x*3(1-2)+4x^2-4x;
2x*(1-2x)+4x^2-4x;
2x-4x^2+4x^2-4x
Ответ = -2x
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Answers & Comments
3x^3-3x+(-x^2+2)2x;
3x^3-3x-2x^3+4x
Ответ = x^3+x
2)2/3x(3-6x)+4x(x-1)=2/3x*3(1-2)+4x^2-4x;
2x*(1-2x)+4x^2-4x;
2x-4x^2+4x^2-4x
Ответ = -2x