展开 (3k+2l^2)/l

解答

展开

\frac{3 k + 2 l ^{2}}{l}

\frac{3 k}{l} + 2 l

求解步骤

\frac{3 k + 2 l ^{2}}{l}

使用分式法则:

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

\frac{3 k + 2 l ^{2}}{l} = \frac{3 k}{l} + \frac{2 l ^{2}}{l}

= \frac{3 k}{l} + \frac{2 l ^{2}}{l}

消掉

\frac{2 l ^{2}}{l} : 2 l

= \frac{3 k}{l} + 2 l

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