展开 ((x+2)(x+1))/((5x+7))

解答

展开

\frac{( x + 2 ) ( x + 1 )}{( 5 x + 7 )}

\frac{x ^{2} + 3 x + 2}{5 x + 7}

求解步骤

\frac{( x + 2 ) ( x + 1 )}{5 x + 7}

乘开

(x + 2) (x + 1) : x^{2} + 3 x + 2

= \frac{x ^{2} + 3 x + 2}{5 x + 7}

e x p an d e^{a^{3}} \cdot (3 a^{2} x - a^{2})

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

e x p an d \frac{1}{2 + x}

e x p an d 11 (16 x + 19 z = 31)

e x p an d 3 (x + \frac{1}{3} y = \frac{5}{3})