Question

factorise 3y^2 + 3y - 36

Answer 1

3y^2  + 3y - 36 = 0
3y^2 + 12y - 9y - 36 = 0
3y [ y + 4 ] - 9 [ y + 4 ] = 0
[ 3y - 9 ] [ y + 4 ] = 0
∴ 3y = 9 ⇒ y = 3
and,
∴ y = -4
So,

y = 3 , -4

Answer 2

I hope it helps your