因式分解 9^2-2x-12

解答

因式分解

9^{2} - 2 x - 12

- 2 x + 69

求解步骤

9^{2} - 2 x - 12

9^{2} = 81

= 81 - 2 x - 12

对同类项分组

= - 2 x + 81 - 12

数字相加/相减:

81 - 12 = 69

= - 2 x + 69

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

f a c t or \frac{x - 16}{x - 4}

f a c t or 3 y^{2} + 7 - 20

s im pl i f y [1100]

f a c t or l m (e)