展开 (-a(b-2a)+3c(-b-2a))/(a(b-2a)+3c(b-2a))

解答

展开

\frac{- a ( b - 2 a ) + 3 c ( - b - 2 a )}{a ( b - 2 a ) + 3 c ( b - 2 a )}

\frac{- ab + 2 a ^{2} - 3 b c - 6 a c}{ab - 2 a ^{2} + 3 b c - 6 a c}

求解步骤

\frac{- a ( b - 2 a ) + 3 c ( - b - 2 a )}{a ( b - 2 a ) + 3 c ( b - 2 a )}

乘开

a (b - 2 a) + 3 c (b - 2 a) : ab - 2 a^{2} + 3 b c - 6 a c

= \frac{- a ( b - 2 a ) + 3 c ( - 2 a - b )}{ab - 2 a ^{2} + 3 b c - 6 a c}

乘开

- a (b - 2 a) + 3 c (- b - 2 a) : - ab + 2 a^{2} - 3 b c - 6 a c

= \frac{- ab + 2 a ^{2} - 3 b c - 6 a c}{ab - 2 a ^{2} + 3 b c - 6 a c}

e x p an d (e^{2 t} + e^{- t})^{2}

\frac{d ^{2}}{d x ^{2}} ((z (x, y)) (x^{2} y^{2} - y^{3} + 3 x^{4} + 5))

e x p an d 3 (7 - 6)

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

e x p an d \frac{5 ( 5 - 7 )}{3}