Question

求解几个因式分解1：2X^2-7X-42:ax^2+（a+1）x=13:x^2-3x^2-4谁会告诉下,

Answer 1

1：2X^2-7X-4

=(2x+1)(x-4)

2:ax^2+（a+1）x+1

=(ax+1)(x+1)

3:x^2-3x-4

=(x-4)(x+1)

x^2-3x^2-4=-2x^2-4=-2(x^2+2)