Aprocess used to make a quadratic expression into a perfect square trinomial is called

It is completing the square. Very useful since it finds the min or max.

y = x^2 + 8x + 17
y = (x^2 + 8x + ...  ) + 17
y = x^2 + 8x + (8/2) ^2 + 17 - 4^2
y = (x^2 + 8x + 4^2 ) + 17 - 16
y = (x^2 + 8x + 16) + 1
y = (x + 4)^2 + 1

This means that the graph has a minimum at (-4 , 1) Check it out on the graph I've given you.

Ais the correct answer

Yes, that is the correct formula. to solve this problem given the number of years, plug in the number of years for t and plug the whole thing into the