展开 x^2((x+3.6))/(x+0.4)

解答

展开

x^{2} \frac{( x + 3.6 )}{x + 0.4}

\frac{x ^{3} + 3.6 x ^{2}}{x + 0.4}

求解步骤

x^{2} \frac{x + 3.6}{x + 0.4}

分式相乘:

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

= \frac{( x + 3.6 ) x ^{2}}{x + 0.4}

乘开

(x + 3.6) x^{2} : x^{3} + 3.6 x^{2}

= \frac{x ^{3} + 3.6 x ^{2}}{x + 0.4}

e x p an d \frac{4 ( x - 3 )}{x - 5}

s im pl i f y (3 x + 1) (3 x - 1)

e x p an d \frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{( - 2 l + 2 + a ) ^{2}}

e x p an d (4 x + 7 y = - 8, 0) \cdot 3 + (3 x + 5 y = - 58) \cdot (- 4)

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