Предмет: Алгебра, автор: marchukyaroslav0206

Пожалуста даю 20 балів

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Ответы

Автор ответа: Пеппер

Объяснение:

1) (5а³-20а²)-(4а³-18а²)=5а³-20а²-4а³+18а²=а³-2а²

(-3)³-2(-3)²=-27-2*9=-27-18=-45

2) 4b²-(7b²-3bc)+(3b²-7bc)=4b²-7b²+3bc+3b²-7bc=-4bc

-4(-1,5)*4=24

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