展开 (4(x+3)(x+1))/((x+5)(x-5))

解答

展开

\frac{4 ( x + 3 ) ( x + 1 )}{( x + 5 ) ( x - 5 )}

\frac{4 x ^{2} + 16 x + 12}{x ^{2} - 25}

求解步骤

\frac{4 ( x + 3 ) ( x + 1 )}{( x + 5 ) ( x - 5 )}

乘开

(x + 5) (x - 5) : x^{2} - 25

= \frac{4 ( x + 3 ) ( x + 1 )}{x ^{2} - 25}

乘开

4 (x + 3) (x + 1) : 4 x^{2} + 16 x + 12

= \frac{4 x ^{2} + 16 x + 12}{x ^{2} - 25}

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