展开 (4sqrt(x-8))(2x+3)

解答

展开

(4 x - 8) (2 x + 3)

8 x x - 8 + 12 x - 8

求解步骤

(4 x - 8) (2 x + 3)

使用分配律:

a (b + c) = ab + a c

(4 x - 8) (2 x + 3) = 4 x - 8 \cdot 2 x + 4 x - 8 \cdot 3

= 4 x - 8 \cdot 2 x + 4 x - 8 \cdot 3

化简

4 x - 8 \cdot 2 x + 4 x - 8 \cdot 3 : 8 x x - 8 + 12 x - 8

= 8 x x - 8 + 12 x - 8

e x p an d (a sin (θ) - a)^{2}

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

e x p an d \frac{10 x}{( x ^{2} + 1 ) ^{2}}

e x p an d \frac{1}{4} (3 (1, 2, 3, - 2) + 2 (0, - 2, 1, 2) - (2, - 2, 1, 3))

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