Question

If a=12,b=9, and c=4, what is b2−2c2a+c−b?

Answer 1

replace the given

9*2-2*4*2*12+4-9

=18-192-5

=-179

Answer 2

let a=12,b=9,c=4

substituting the values

9(2)-2(4)2(12)+4-9

18-192-5

18-197

- 179