展开 ((a-4)(a+6))/6

解答

展开

\frac{( a - 4 ) ( a + 6 )}{6}

\frac{a ^{2}}{6} + \frac{a}{3} - 4

求解步骤

\frac{( a - 4 ) ( a + 6 )}{6}

乘开

(a - 4) (a + 6) : a^{2} + 2 a - 24

= \frac{a ^{2} + 2 a - 24}{6}

使用分式法则:

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

\frac{a ^{2} + 2 a - 24}{6} = \frac{a ^{2}}{6} + \frac{2 a}{6} - \frac{24}{6}

= \frac{a ^{2}}{6} + \frac{2 a}{6} - \frac{24}{6}

消掉

\frac{2 a}{6} : \frac{a}{3}

= \frac{a ^{2}}{6} + \frac{a}{3} - \frac{24}{6}

数字相除:

\frac{24}{6} = 4

= \frac{a ^{2}}{6} + \frac{a}{3} - 4

e x p an d \frac{2 ( 3 + 4 z )}{3 w - 4 z}

e x p an d 3 x^{2} + x^{2}

e x p an d a \cdot ((a - b) \cdot (a + 2 b))

e x p an d \frac{( y ^{2} - 4 ) ^{2}}{2}

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