化简 (-x^3-x)+(6x^2+6x-7)

解答

化简

(- x^{3} - x) + (6 x^{2} + 6 x - 7)

- x^{3} + 6 x^{2} + 5 x - 7

求解步骤

(- x^{3} - x) + (6 x^{2} + 6 x - 7)

化简

(- x^{3} - x) + (6 x^{2} + 6 x - 7) : - x^{3} - x + 6 x^{2} + 6 x - 7

= - x^{3} - x + 6 x^{2} + 6 x - 7

对同类项分组

= - x^{3} + 6 x^{2} - x + 6 x - 7

e x p an d (a - 1) (a + 1)

e x p an d (4 + 3 c^{5}) (4 - 3 c^{5})

e x p an d (10 - x)^{2}

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

s im pl i f y \frac{sin ( t )}{1 - cos ( t )} - csc (t)