展开 (L^2(P+WL))/(16)

解答

展开

\frac{L ^{2} ( P + W L )}{16}

\frac{L ^{2} P}{16} + \frac{L ^{3} W}{16}

求解步骤

\frac{L ^{2} ( P + W L )}{16}

乘开

L^{2} (P + W L) : L^{2} P + L^{3} W

= \frac{L ^{2} P + L ^{3} W}{16}

使用分式法则:

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

\frac{L ^{2} P + L ^{3} W}{16} = \frac{L ^{2} P}{16} + \frac{L ^{3} W}{16}

= \frac{L ^{2} P}{16} + \frac{L ^{3} W}{16}

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