Question

x的平方-y的平方+3x+y+2因式分解

Answer 1

x^2+3x+(3/2)^2-(y^2-y+1/4)

=(x+3/2)^2-(y-1/2)^2

=(x+3/2+y-1/2)(x+3/2-y+1/2)

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