展开 x(-15y^2+2x^2y=0)

解答

展开

x (- 15 y^{2} + 2 x^{2} y = 0)

- 15 x y^{2} + 2 x^{3} y = 0

求解步骤

x (- 15 y^{2} + 2 x^{2} y = 0)

= x (- 15 y^{2} + 2 \cdot 0 = x^{2} y)

使用分配律:

a (b + c) = ab + a c

a = x, b = - 15 y^{2}, c = 2 x^{2} y = 0

x (- 15 y^{2}) + x \cdot 2 x^{2} y = 0

使用加减运算法则

+ (- a) = - a

- 15 x y^{2} + 2 x^{2} x y = 0

乘开

- 15 x y^{2} + 2 x^{2} x y : - 15 x y^{2} + 2 x^{3} y

- 15 x y^{2} + 2 x^{3} y = 0

e x p an d ln (5 6 r^{5} s)

e x p an d \frac{( y + 2 ) ( y - 2 )}{4}

s im pl i f y (\frac{6}{x - 8} + 3 (100 - x)) (x - 8)

s im pl i f y \frac{1}{2 a ( 2 a ^{\frac{2}{3}} + 3 a ^{2} )}

\frac{\partial}{\partial u} ((x) (u^{2} - v^{2}))