展开 ((x+3)(x+5))/(x+2)

解答

展开

\frac{( x + 3 ) ( x + 5 )}{x + 2}

\frac{x ^{2} + 8 x + 15}{x + 2}

求解步骤

\frac{( x + 3 ) ( x + 5 )}{x + 2}

乘开

(x + 3) (x + 5) : x^{2} + 8 x + 15

= \frac{x ^{2} + 8 x + 15}{x + 2}

s im pl i f y (x lo g_{10} (x) - x) (\frac{1}{4 x ^{2}} - \frac{x}{4})

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e x p an d x - 2 \cdot (x^{2} - 2)

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s im pl i f y (x - 22) (x + 22)