展开 ((5x-6)(x+2))x

解答

展开

((5 x - 6) (x + 2)) x

5 x^{3} + 4 x^{2} - 12 x

求解步骤

((5 x - 6) (x + 2)) x

去除括号:

(a) = a

= (5 x - 6) (x + 2) x

= x (5 x - 6) (x + 2)

乘开

(5 x - 6) (x + 2) : 5 x^{2} + 4 x - 12

= x (5 x^{2} + 4 x - 12)

乘开

x (5 x^{2} + 4 x - 12) : 5 x^{3} + 4 x^{2} - 12 x

= 5 x^{3} + 4 x^{2} - 12 x

e x p an d \frac{( y + 2 ) ^{2}}{5 ( y - 2 )}

e x p an d (2 x - 9) + e^{x} (2 y - cos (y)) y^{'} (x)

s im pl i f y (2 + 1 - x^{2})^{2}

e x p an d π (1 + x^{2})^{2}

e x p an d \frac{( n + 1 ) ^{2}}{4 n}