展开 ((x+2)(x-2))/((x-4))

解答

展开

\frac{( x + 2 ) ( x - 2 )}{( x - 4 )}

\frac{x ^{2} - 4}{x - 4}

求解步骤

\frac{( x + 2 ) ( x - 2 )}{x - 4}

乘开

(x + 2) (x - 2) : x^{2} - 4

= \frac{x ^{2} - 4}{x - 4}

e x p an d 2 x^{2} + 8 x + 8 + 2 x^{2} + 8 x + 8 + 4 x + 8 + 4 x + 8

e x p an d (x - y + 2) d x - d y

e x p an d \frac{1}{s ^{2} - s + 2} \cdot \frac{12 ( 2 s - 1 )}{s + 1}

e x p an d \frac{x ( x ^{2} - 4 ) ^{2}}{12 y}

e x p an d - \frac{1}{5 \cdot ( s + 2 ) ^{3}}