Помогите срочно 9m(m-2)-(3m-1)

Question

Помогите срочно 9m(m-2)-(3m-1)

Answer 1

9m*+9m- 9m*2+1=19

9m =19-1

m=18/9

m=2

Answer 2

9m(m-2)-(3m-1)=9m²-18m-3m+1=9m²-15m+1