展开 (2(a+b)(a-b))/(a-b^2)

解答

展开

\frac{2 ( a + b ) ( a - b )}{a - b ^{2}}

\frac{2 a ^{2} - 2 b ^{2}}{a - b ^{2}}

求解步骤

\frac{2 ( a + b ) ( a - b )}{a - b ^{2}}

乘开

2 (a + b) (a - b) : 2 a^{2} - 2 b^{2}

= \frac{2 a ^{2} - 2 b ^{2}}{a - b ^{2}}

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

s im pl i f y (\frac{a}{6} - \frac{x ^{3}}{5}) (\frac{a}{6} + \frac{x ^{3}}{5})

s im pl i f y 4 (cos^{2} (2 x) + sin^{2} (2 y))

e x p an d (5 - 22) (5 + 2)

e x p an d 800 (2 x + 7 y = 121)