Final answer to the problem
Step-by-step Solution
Learn how to solve completing the square problems step by step online. Factor the expression -t^2+2t+15. Use the complete the square method to factor the trinomial of the form ax^2+bx+c. Take common factor a (-1) to all terms. Add and subtract \displaystyle\left(\frac{b}{2a}\right)^2. Factor the perfect square trinomial t^2+-2t+1. Subtract the values -15 and -1.