展开-3((w-7)(x-8(3-z)))

解答

展开

- 3 ((w - 7) (x - 8 (3 - z)))

- 3 w x + 72 w - 24 w z + 21 x - 504 + 168 z

求解步骤

- 3 ((w - 7) (x - 8 (3 - z)))

去除括号:

(a) = a

= - 3 (w - 7) (x - 8 (3 - z))

乘开

x - 8 (3 - z) : x - 24 + 8 z

= - 3 (w - 7) (x + 8 z - 24)

乘开

(w - 7) (x - 24 + 8 z) : w x - 24 w + 8 w z - 7 x + 168 - 56 z

= - 3 (w x - 24 w + 8 w z - 7 x + 168 - 56 z)

乘开

- 3 (w x - 24 w + 8 w z - 7 x + 168 - 56 z) : - 3 w x + 72 w - 24 w z + 21 x - 504 + 168 z

= - 3 w x + 72 w - 24 w z + 21 x - 504 + 168 z

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