展开 a(-2,-pi/3)

解答

展开

a (- 2, - \frac{π}{3})

- 2 a, - \frac{π}{3} a

求解步骤

a (- 2, - \frac{π}{3})

= (- 2, - \frac{π}{3}) a

使用分配律:

a (b - c) = ab - a c

a = a, b = - 2,, c = \frac{π}{3}

= a (- 2,) - a \frac{π}{3}

使用加减运算法则

+ (- a) = - a

= - 2 a, - \frac{π}{3} a

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