Use a special-product rule to factor the perfect-square trinomial.
81y^2+ 126y + 49

The perfect -square trinomial

                  (9y+7)²

Step-by-step explanation:

Explanation:-

Given polynomial equation

                        81 y² + 126 y +49

               ⇒     9² y² + 2(9)(7)y + 7²

                ⇒   (9y)² + 2(9)(7)y +7²

we will use formula

   (a+b)² = a² + 2ab +b²

             ⇒ (9y+7)²

Final -

The perfect -square trinomial

                  (9y+7)²

answer: the answer is 127 degrees

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

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