(5m-1)*(m+1)-5m8(m+2)

Question

(5m-1)*(m+1)-5m8(m+2)

Answer 1

(5m-1)*(m+1)-5m8(m+2) = 5 m²+5 m - m - 1 -5 m⁹ - 10 m = -5m⁹ +5 m² - 6 m -1

Answer 2

5m-1*m+1-5m+8m+16=9m+16

1)5m+m+8m=14m-5=9m  2) 1-1+16=16