因式分解 x^3+7x^2

解答

因式分解

x^{3} + 7 x^{2}

x^{2} (x + 7)

求解步骤

x^{3} + 7 x^{2}

使用指数法则:

a^{b + c} = a^{b} a^{c}

x^{3} = x x^{2}

= x x^{2} + 7 x^{2}

因式分解出通项

x^{2}

= x^{2} (x + 7)

f a c t or z^{2} - 5 z - 14

s im pl i f y (- 4 k^{4} + 14 + 3 k^{2}) + (- 3 k^{4} - 14 k^{2} - 8)

2 a - \frac{a ^{2}}{2} = 1

f a c t or x (a + 2) - a - 2 + 3 (a + 29)

6 x^{2} - x = x - 6