I tried doing it but I got 4. How do I begin to solve this problem?
We are given:
The first thing I would do is subtract through by 7, then divide through by 3 to get:
Next, complete the square on the left side by adding the square of one half the coefficient of the linear term, i.e. add to get:
Rewrite the left side as the square of a binomial and combine like terms on the right, and what do you get?