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Автор - loginovskikksenia

Выполните действие
А)
 {(2}^{2}  - 3x) - (5x -  {x}^{2} )
Б)
 - 3x(2x - 1)
В)
(3 -  {y}^{2} )(y - 4)

Ответ

Автор - turuturu97

Ответ:

1)

(2 {}^{2}  - 3x) - (5x - x {}^{2} ) \ (4 - 3x) - 5x + x {}^{2}  \ 4 - 3x - 5x + x { }^{2}  \ 4 - 8x + x {}^{2}  \ x {}^{2}  - 8x + 4

2)

 - 3x times (2x - 1) \  - 3x times 2x - 3x times ( - 1) \  - 6x {}^{2}  + 3x

3)

(3 - y {}^{2} ) times (y - 4) \ 3y - 3 times 4 - y {}^{2}  times y - y {}^{2} times ( - 4) \ 3y - 12 - y {}^{3}  + 4y {}^{2}

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