展开 (2(x-7))/(7(x+3))

解答

展开

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

\frac{2 x - 14}{7 x + 21}

求解步骤

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

乘开

7 (x + 3) : 7 x + 21

= \frac{2 ( x - 7 )}{7 x + 21}

乘开

2 (x - 7) : 2 x - 14

= \frac{2 x - 14}{7 x + 21}

s im pl i f y (2 i + 3)^{4} + (2 i - 3)^{4}

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