Упростите выражение 5m(m-2)-(m+2)(m-3)

Question

Упростите выражение 5m(m-2)-(m+2)(m-3)

Answer 1

5m(m-2)-(m+2)(m-30) = 5m²-10m-(m²-30m+2m-60) = 5m²-10-m²+30m-2m+60=4m²+28m+50