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1. Выполните умножение:

а) (5а – 2)(3а + 1); б) (а - 3)(а2 + 4а + 2).

2. Упростите выражение:

а) (3х - 2)(х – 7) – (5х + 1)(2х – 4);

б) (5х – 2у)(3х + 5у) - (2,5х – 3у)(4х + 8у).

3. Решите уравнение:

а) (2х + 6)(7 – 4х) = (2 – х)(8х + 1) – 15;

б) (х + 7)(х – 2) – (х + 4)(х + 3) = – 2.

artyomalimbekov

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Daann4ik

Вот держи. Плз лучший ответ. 3 задание под б оно внизу

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