化简 (x+1)(x-7/9)

解答

化简

(x + 1) (x - \frac{7}{9})

\frac{( x + 1 ) ( 9 x - 7 )}{9}

求解步骤

(x + 1) (x - \frac{7}{9})

化简

x - \frac{7}{9} : \frac{9 x - 7}{9}

= (x + 1) \frac{9 x - 7}{9}

使用分式法则:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( x + 1 ) ( 9 x - 7 )}{9}

e x p an d \frac{( 1 - y ) ^{3}}{3}

e x p an d (\frac{b}{a} (x - x_{0}) + y_{0} - c)^{2}

e x p an d ((a \cdot x) - b + ((x - (\frac{l}{2})) \cdot c)) \cdot (x - (\frac{l}{2}))

e x p an d (x e^{\frac{1}{x}} - x) \cdot (x \cdot e^{\frac{1}{x}} + x)

e x p an d x (cos (x) - sin (x))