化简 sqrt(x)-sqrt(3)(sqrt(x)+sqrt(3))

解答

化简

x - 3 (x + 3)

x (1 - 3) - 3

求解步骤

x - 3 (x + 3)

展开

3 (x + 3) : 3 x + 3

= x - (3 x + 3)

展开

- (3 x + 3) : - 3 x - 3

= x - 3 x - 3

因式分解出通项

x : x (1 - 3)

= x (1 - 3) - 3

e x p an d \frac{1}{( x + 4 ) ( x ^{3} + 6 x ^{2} + 6 )}

e x p an d - \frac{3 x ( - 2 x ^{2} + 9 )}{( x ^{2} + 3 ) ^{\frac{7}{2}}}

e x p an d A (8, 3) B (1, - 4)

e x p an d \frac{( 3 x ^{2} - 11 x - 62 )}{( x ^{2} - 4 ) ( x + 1 )}

e x p an d 3 x^{2} 3 x^{7}