展开 (3,6)y(-2,-2)

解答

展开

(3, 6) y (- 2, - 2)

- 2 (3 \cdot 6,) y, - 2 (3 \cdot 6,) y

求解步骤

(3, 6) y (- 2, - 2)

= (3 \cdot 6,) (- 2, - 2) y

使用分配律:

a (b - c) = ab - a c

a = (3, 6) y, b = - 2,, c = 2

= (3, 6) y (- 2,) - (3, 6) y \cdot 2

使用加减运算法则

+ (- a) = - a

= - 2 (3 \cdot 6,) y, - 2 (3 \cdot 6,) y

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e x p an d \frac{18 ( 2511 + 2 2 - 3 )}{5}

e x p an d \frac{d x}{x ^{2} ( x ^{2} - 25 )}

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e x p an d \frac{y ^{8} + 2 y ^{4} + 1}{4 y ^{4}}