Question

(2y+3)²=81 solve by factorization method​

Answer 1

(2y+3)^2=81

Rooting both sides

Then, (2y+3)=9
Then, 2y=9-3
Then, 2y=6
Therefore y=6/3
y=2.

Answer 2

4y² + 9 + 12y = 81

4y² + 12y + 9 - 81 = 0

4y² + 12y - 72 = 10

y² + 3y - 18 = 0

y² + 6y - 3y - 18 = 0

y (y + 6) - 3 (y + 6) = 0

(y - 3)(y + 6 ) = 0

y - 3 = 0 => y = 3

y + 6 = 0 => y = -6