Question

x^2-4xy+4y^2+x-2y-6分解因式

Answer 1

x^2-4xy+4y^2+x-2y-6

=(x^2-4xy+4y^2)+(x-2y)-6

=(x-2y)^2+(x-2y)-6

=[(x-2y)+3][(x-2y)-2]

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