m²+4m+4分m²-4除m+2分m-2(a²-2a)除a分a-2

m²+4m+4分m²-4除m+2分m-2(a²-2a)除a分a-2
m²+4m+4分m²-4除m+2分m-2
(a²-2a)除a分a-2

m²+4m+4分m²-4除m+2分m-2(a²-2a)除a分a-2
m²+4m+4分m²-4除m+2分m-2
=（m+2)^2分之（m+2）（m-2）除m+2分m-2
=（m+2）分之（m-2）除m+2分m-2
=1
(a²-2a)除a分a-2
=a（a-2）除a分a-2
=a（a-2）*（a-2）分之a
=a^2

原式=(m+2)²分之(m+2)(m-2) ×(m-2)分之(m+2)
=(m+2)分之(m-2) ×(m-2)分之(m+2)
=1
原式=a(a-2) ×(a-2)分之a
=a方