展开 (8l^2-16l+a^2+6a-6la+8)/((-2l+2+a)^2)

解答

展开

\frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{( - 2 l + 2 + a ) ^{2}}

\frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{- 4 l a + 4 a + a ^{2} + 4 l ^{2} - 8 l + 4}

求解步骤

\frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{( - 2 l + 2 + a ) ^{2}}

(- 2 l + 2 + a)^{2} = - 4 l a + 4 a + a^{2} + 4 l^{2} - 8 l + 4

= \frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{( - 4 l a + 4 a + a ^{2} + 4 l ^{2} - 8 l + 4 )}

去除括号:

(- a) = - a

= \frac{8 l ^{2} - 16 l + a ^{2} + 6 a - 6 l a + 8}{- 4 l a + 4 a + a ^{2} + 4 l ^{2} - 8 l + 4}

e x p an d (4 x + 7 y = - 8, 0) \cdot 3 + (3 x + 5 y = - 58) \cdot (- 4)

e x p an d \frac{x - 3}{( 3 x + 1 ) ( 3 x - 1 )}

e x p an d e^{3 y} (y - x^{4})

s im pl i f y (3 a - 7) (3 a + 8)

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