展开 ((x+5))/((3-x)*(1+x))

解答

展开

\frac{( x + 5 )}{( 3 - x ) \cdot ( 1 + x )}

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

求解步骤

\frac{x + 5}{( 3 - x ) ( 1 + x )}

乘开

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

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

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