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Автор - vsmlt

1) (x + y)(a - b);
2) (a² – b²)(a+b);
3) (a - b + c)(a -c);
4) (a - 3)(a - 2) - (a-1)(a - 4)

хелб ми плес.​

Ответ

Автор - tatsach

Ответ:

Объяснение:

1) (x + y)(a - b)=ха=хб+уа-уб

2) (a² – b²)(a+b)=а³+а²б-аб²-б³

3) (a - b + c)(a -c)=а²-ас-ба+бс+ас-с²

4) (a - 3)(a - 2) - (a-1)(a - 4)=а²-2а-3а+6-а²+4а+а-4=2-а

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