因式分解-x^3+x^2+x-1

解答

因式分解

- x^{3} + x^{2} + x - 1

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

求解步骤

- x^{3} + x^{2} + x - 1

因式分解

- 1 : - (x^{3} - x^{2} - x + 1)

= - (x^{3} - x^{2} - x + 1)

因式分解

x^{3} - x^{2} - x + 1 : (x - 1) (x + 1) (x - 1)

= - (x - 1) (x + 1) (x - 1)

使用指数法则:

aa = a^{2}

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

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

- 9 + 4 (1.5 x - 2.5) - 7 x = - 7.25

x \cdot 0.08542 + (1 - x) \cdot 0.01192 = 0.0818

5 x - 2 = 38

s im pl i f y 0. 5^{1}

x 2 = 6