(5y+9)(6-y)=0

Solution for (5y+9)(6-y)=0 equation:

Simplifying
(5y + 9)(6 + -1y) = 0

Reorder the terms:
(9 + 5y)(6 + -1y) = 0

Multiply (9 + 5y) * (6 + -1y)
(9(6 + -1y) + 5y * (6 + -1y)) = 0
((6 * 9 + -1y * 9) + 5y * (6 + -1y)) = 0
((54 + -9y) + 5y * (6 + -1y)) = 0
(54 + -9y + (6 * 5y + -1y * 5y)) = 0
(54 + -9y + (30y + -5y2)) = 0

Combine like terms: -9y + 30y = 21y
(54 + 21y + -5y2) = 0

Solving
54 + 21y + -5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(6 + -1y)(9 + 5y) = 0

Subproblem 1
Set the factor '(6 + -1y)' equal to zero and attempt to solve:

Simplifying
6 + -1y = 0

Solving
6 + -1y = 0

Move all terms containing y to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + -1y = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1y = 0 + -6
-1y = 0 + -6

Combine like terms: 0 + -6 = -6
-1y = -6

Divide each side by '-1'.
y = 6

Simplifying
y = 6
Subproblem 2
Set the factor '(9 + 5y)' equal to zero and attempt to solve:

Simplifying
9 + 5y = 0

Solving
9 + 5y = 0

Move all terms containing y to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + 5y = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 5y = 0 + -9
5y = 0 + -9

Combine like terms: 0 + -9 = -9
5y = -9

Divide each side by '5'.
y = -1.8

Simplifying
y = -1.8
Solution
y = {6, -1.8}