Автор - 2323232323566

1.
1)2x(x/2-3x+5)
2)(a-3)(a+7)
3)(2x-3y)4x+5y)
4)(x-4)(x/2+x-2)

Ответ

Автор - vikasponarsckay2002

Ответ:

2) \ (a - 3) times (a + 7) \ a times a + 7a - 3a - 3 times 7 \ a {?}^{2}  + 7a - 3a \ a {?}^{2}  + 4a - 21

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