Question

因式分解1+m+4分之m的平方 （x+y）的平方-10（x+y）+25

Answer 1

1+m+m²/4

=1²+2×1×m/2+(m/2)²

=(1+m/2)²

(x+y)²-10(x+y)+25

=[(x+y)-5]²

=(x+y-5)²