展开 ((2x-2)(x+1))/(x+2)

解答

展开

\frac{( 2 x - 2 ) ( x + 1 )}{x + 2}

\frac{2 x ^{2} - 2}{x + 2}

求解步骤

\frac{( 2 x - 2 ) ( x + 1 )}{x + 2}

乘开

(2 x - 2) (x + 1) : 2 x^{2} - 2

= \frac{2 x ^{2} - 2}{x + 2}

e x p an d (x - 2) (x + 5 = 0)

e x p an d (2, 3, 5) x (- 2, - 4, - 9)

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

e x p an d a (2, - 1) + b (0, 2)

e x p an d \frac{( x - 7 ) ( x + 2 )}{( x + 6 ) ( x - 8 )}