To find out what the perfect square trinomial is, look at the middle term and the last term.
(Middle term ÷ 2)² has to be the last term
y² + 6y + 36
divide 6 ÷ 2 = 3
square it 3² = 9
This trinomial is not a perfect square trinomial.
Your answers are
y² + 20y + 100 , y² + 18y + 81
