因式分解 4k^2-1

解答

因式分解

4 k^{2} - 1

(2 k + 1) (2 k - 1)

求解步骤

4 k^{2} - 1

使用指数运算法则

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

使用平方差公式:

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

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

= (2 k + 1) (2 k - 1)

\frac{1}{4} t + \frac{1}{2} < \frac{2}{3} t - 2

s im pl i f y \frac{33}{2} - \frac{33}{2 ( 10 ) ^{2}}

f a c t or x^{3} - x^{2} - 4

x + 2 = 3

x^{2} - 5 x = - \frac{9}{4}