Company A is selling a certain product.

The cost of a product is given by C(q)=2+2q+q^2 where q is the quantity in millions.

The revenue is given by R(q)=pq where p is the price and p=8-2q.

It can be shown that the profit F(q)=R(q)-C(q)=...=-3q^2+6q-2.

Now there is another company B offering the same product at 1.5 millions.

Show that the profit for company A is now F(q)=-3q^2+3q-2.

How to show? need help please.