Question

(2b2 – 9)(6b2 – 9b + 6)

Answer 1

You will have to clarify whether you mean 2(b)^2 or (2b)^2

Answer 2

its 2b squared

Answer 3

2b^2

Answer 4

Just multiply them in order
12b^4-18b^3+12b^2-54b^2+81b-54 and simplify

Answer 5

and thats what I did and got \[12b ^{4}-18b ^{3}-42b ^{2}+81b-54\]