因式分解 t^2-1

解答

因式分解

t^{2} - 1

(t + 1) (t - 1)

求解步骤

t^{2} - 1

将

1

改写为

1^{2}

= t^{2} - 1^{2}

使用平方差公式:

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

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

= (t + 1) (t - 1)

9 x^{2} - 36 x = 0

s im pl i f y (32 x^{10} y^{15})^{\frac{1}{5}}

- \frac{49}{10} (x)^{2} + 23 (x) = 10

5 - 3 (1 - x) = 2 - 3 x

s im pl i f y 7 y^{4}