展开 ((13+y))/3*5

解答

展开

\frac{( 13 + y )}{3} \cdot 5

\frac{65}{3} + \frac{5 y}{3}

求解步骤

\frac{13 + y}{3} \cdot 5

分式相乘:

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

= \frac{( 13 + y ) \cdot 5}{3}

乘开

(13 + y) \cdot 5 : 65 + 5 y

= \frac{65 + 5 y}{3}

使用分式法则:

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

\frac{65 + 5 y}{3} = \frac{65}{3} + \frac{5 y}{3}

= \frac{65}{3} + \frac{5 y}{3}

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

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

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

e x p an d 5 (311)

e x p an d 3^{12}