展开 (6-7x^2-x^4)/((9+x^2)(1+x^2))

解答

展开

\frac{6 - 7 x ^{2} - x ^{4}}{( 9 + x ^{2} ) ( 1 + x ^{2} )}

\frac{6 - 7 x ^{2} - x ^{4}}{9 + 10 x ^{2} + x ^{4}}

求解步骤

\frac{6 - 7 x ^{2} - x ^{4}}{( 9 + x ^{2} ) ( 1 + x ^{2} )}

乘开

(9 + x^{2}) (1 + x^{2}) : 9 + 10 x^{2} + x^{4}

= \frac{6 - 7 x ^{2} - x ^{4}}{9 + 10 x ^{2} + x ^{4}}

e x p an d \frac{4 ( 1 + 26 )}{5}

\frac{\partial}{\partial t} ((x) (x^{3} + x t + 3 t^{3}))

e x p an d 50 (100 - e^{\frac{x}{2}})

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

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