展开 a(-3,-1)

解答

展开

a (- 3, - 1)

- 3 a, - 1 \cdot a

求解步骤

a (- 3, - 1)

= (- 3, - 1) a

使用分配律:

a (b - c) = ab - a c

a = a, b = - 3,, c = 1

= a (- 3,) - a \cdot 1

使用加减运算法则

+ (- a) = - a

= - 3 a, - 1 \cdot a

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