5m²n-20mn² и ax+by-ay-bx помогитеееее!!!!!!

Question

5m²n-20mn² и ax+by-ay-bx помогитеееее!!!!!!

Answer 1

5m²n-20mn²=5mn(m-4n)

ax+by-ay-bx=

ax-ay-bx+by=

a(x-y)-b(x-y)=

(a-b)(x-y)