展开 ((tan^2(x)-7)(tan(x)-8))/(tan(x)+1)

解答

展开

\frac{( tan ^{2} ( x ) - 7 ) ( tan ( x ) - 8 )}{tan ( x ) + 1}

\frac{tan ^{3} ( x ) - 8 tan ^{2} ( x ) - 7 tan ( x ) + 56}{tan ( x ) + 1}

求解步骤

\frac{( tan ^{2} ( x ) - 7 ) ( tan ( x ) - 8 )}{tan ( x ) + 1}

乘开

(tan^{2} (x) - 7) (tan (x) - 8) : tan^{3} (x) - 8 tan^{2} (x) - 7 tan (x) + 56

= \frac{tan ^{3} ( x ) - 8 tan ^{2} ( x ) - 7 tan ( x ) + 56}{tan ( x ) + 1}

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