展开 (2(8x+7))/((3x-1)^3)

解答

展开

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

\frac{16 x + 14}{27 x ^{3} - 27 x ^{2} + 9 x - 1}

求解步骤

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

(3 x - 1)^{3} = 27 x^{3} - 27 x^{2} + 9 x - 1

= \frac{2 ( 8 x + 7 )}{27 x ^{3} - 27 x ^{2} + 9 x - 1}

乘开

2 (8 x + 7) : 16 x + 14

= \frac{16 x + 14}{27 x ^{3} - 27 x ^{2} + 9 x - 1}

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