Question

calcula( 4x2-1 ) (6x2-9)

Answer 1

4x2=8
8-1=7
6x2=12
12-9=3

Answer 2

4*2=8 8-1=7 =7 6*2=12 12-9=3 (4*2-1) (6*2-9) =7 =3