因式分解 x^3+3x^2y+3xy^2+y^3

解答

因式分解

x^{3} + 3 x^{2} y + 3 x y^{2} + y^{3}

(x + y)^{3}

求解步骤

x^{3} + 3 x^{2} y + 3 x y^{2} + y^{3}

使用和的立方运算法则:

x^{3} + 3 x^{2} y + 3 x y^{2} + y^{3} = (x + y)^{3}

x^{3} + 3 x^{2} y + 3 x y^{2} + y^{3} = (x + y)^{3}

= (x + y)^{3}

3 d^{2} + d = - 2 d

- 1 < 2 x - 5 < 7

s im pl i f y (0.5 a - 0.6 b + 5.5) - (- 0.5 a + 0.4 b) + (1.3 b - 4.5)

x^{2} + 6 x = 14

14 m^{2} - 12 m = 0