展开 (4-xy^2)/(xy(2-xy))

解答

展开

\frac{4 - x y ^{2}}{x y ( 2 - x y )}

\frac{4 - x y ^{2}}{2 x y - x ^{2} y ^{2}}

求解步骤

\frac{4 - x y ^{2}}{x y ( 2 - x y )}

乘开

x y (2 - x y) : 2 x y - x^{2} y^{2}

= \frac{4 - x y ^{2}}{2 x y - x ^{2} y ^{2}}

e x p an d 4.2 x 1 0^{0}

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

e x p an d x d y + y d x + x y (3 d x + d y)

e x p an d [\frac{1}{s ( s ^{2} + 4 )}]

e x p an d 2 (n^{2} + 1) \frac{d m}{d n}