Exercise
$20-y-y^2$
Step-by-step Solution
Learn how to solve completing the square problems step by step online. Factor the expression 20-y-y^2. 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 y^2+y+\frac{1}{4}. Simplify the addition \left(y+\frac{1}{2}\right)^2-20-\frac{1}{4}.
Factor the expression 20-y-y^2
Final answer to the exercise
$-\left(y+\frac{1}{2}\right)^2+\frac{81}{4}$