因式分解-x^2-3x+40

解答

因式分解

- x^{2} - 3 x + 40

- (x - 5) (x + 8)

求解步骤

- x^{2} - 3 x + 40

因式分解

- 1 : - (x^{2} + 3 x - 40)

= - (x^{2} + 3 x - 40)

因式分解

x^{2} + 3 x - 40 : (x - 5) (x + 8)

= - (x - 5) (x + 8)

3 ∣ 4 x - 2 ∣ - 1 = 59

f a c t or x^{2} - 2 x y - 63 y^{2}

9 x^{2} - 1 = 24

s im pl i f y (2 a - 3 b) 4 b - 3 a (a - 2 b)

f a c t or 3 a^{2} - 4 ab - 20 b^{2}