展开 \sqrt[3]{x}(8-x)

解答

展开

3 x (8 - x)

8 3 x - x 3 x

求解步骤

3 x (8 - x)

使用分配律:

a (b - c) = ab - a c

3 x (8 - x) = 3 x \cdot 8 - 3 x x

= 3 x \cdot 8 - 3 x x

= 8 3 x - x 3 x

e x p an d tan^{2} (x) (csc (x) - 1)

e x p an d 6 - 2 (y^{2} + x^{2})

s im pl i f y (x + 32) (x - 32)

e x p an d (sin^{6} (x) + cos^{6} (x) - 1) (sec^{2} (x) + csc^{2} (x))

e x p an d \frac{x ^{2} - 3 x}{( x - 2 ) ( x ^{2} + 1 )}