展开-4(=2p+10)

解答

展开

- 4 (= 2 p + 10)

- 4 = 2 p - 40

求解步骤

- 4 (= 2 p + 10)

= - 4 (2 = p + 10)

使用分配律:

a (b + c) = ab + a c

a = - 4, b = + = 2 p, c = 10

- 4 = 2 p + (- 4) \cdot 10

使用加减运算法则

+ (- a) = - a

- 4 = 2 p - 4 \cdot 10

乘开

2 p - 4 \cdot 10 : 2 p - 40

- 4 = 2 p - 40

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