展开 (-x^2y+y^3)/((x^2+y^2)^2)

解答

展开

\frac{- x ^{2} y + y ^{3}}{( x ^{2} + y ^{2} ) ^{2}}

\frac{- x ^{2} y + y ^{3}}{x ^{4} + 2 x ^{2} y ^{2} + y ^{4}}

求解步骤

\frac{- x ^{2} y + y ^{3}}{( x ^{2} + y ^{2} ) ^{2}}

(x^{2} + y^{2})^{2} = x^{4} + 2 x^{2} y^{2} + y^{4}

= \frac{- x ^{2} y + y ^{3}}{x ^{4} + 2 x ^{2} y ^{2} + y ^{4}}

e x p an d \frac{2 ( 1.6 s ^{2} + 10 s + 33111258.278 )}{s ^{2}}

s im pl i f y cos^{3} (x) sin (x) + \frac{3}{8} (x - \frac{1}{4} sin (4 x))

e x p an d \frac{( 3 x - 2 ) ( 4 x - 3 )}{( x - 5 ) ( x - 1 )}

e x p an d r^{2} + (a + \frac{4}{a}) r + (0.5 \cdot a^{2} - 2)

e x p an d (x - 2) x - 2