展开 (x^2+6)sqrt(1-x)

解答

展开

(x^{2} + 6) 1 - x

x^{2} 1 - x + 6 1 - x

求解步骤

(x^{2} + 6) 1 - x

= 1 - x (x^{2} + 6)

使用分配律:

a (b + c) = ab + a c

1 - x (x^{2} + 6) = 1 - x x^{2} + 1 - x \cdot 6

= 1 - x x^{2} + 1 - x \cdot 6

= x^{2} 1 - x + 6 1 - x

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

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

e x p an d (5 + 3 e^{7 t})^{4}

s im pl i f y (1 + p - 2) (1 + p + 2)

e x p an d (y = 2, x + 6) (\frac{x}{2} - y = 3)