Question

If (x-3)(x+3)=a, then (2x-6)(x+3)=?
2a
3a
4a
6a
9a

Answer 1

If you simplify (2x-6) = 2(x-3)
2 is a common factor,
I think you can proceed from there

Answer 2

I already found that out, but I'm still confused as to what to do about it @Florcelda

Answer 3

(2x-6)(x+3) = 2(x-3)(x+3)

but (x-3)(x+3) = a

right?

Answer 4

So 2(x-3)(x+3) = 2a