展开 (7x+17)/((x-7)(3x+1))

解答

展开

\frac{7 x + 17}{( x - 7 ) ( 3 x + 1 )}

\frac{7 x + 17}{3 x ^{2} - 20 x - 7}

求解步骤

\frac{7 x + 17}{( x - 7 ) ( 3 x + 1 )}

乘开

(x - 7) (3 x + 1) : 3 x^{2} - 20 x - 7

= \frac{7 x + 17}{3 x ^{2} - 20 x - 7}

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

e x p an d \frac{2 ( - 4 s ^{2} + 2 s - 15 )}{( s + 5 ) ( s ^{2} + 2 s + 10 )}

e x p an d - \frac{19}{( 2 x - 5 ) ^{2}}

e x p an d \frac{( r + θ ) ( r - θ )}{θ ^{2}}

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