5y^2-2y-72=0

Solution for 5y^2-2y-72=0 equation:

Simplifying
5y2 + -2y + -72 = 0

Reorder the terms:
-72 + -2y + 5y2 = 0

Solving
-72 + -2y + 5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-18 + -5y)(4 + -1y) = 0

Subproblem 1
Set the factor '(-18 + -5y)' equal to zero and attempt to solve:

Simplifying
-18 + -5y = 0

Solving
-18 + -5y = 0

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

Add '18' to each side of the equation.
-18 + 18 + -5y = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -5y = 0 + 18
-5y = 0 + 18

Combine like terms: 0 + 18 = 18
-5y = 18

Divide each side by '-5'.
y = -3.6

Simplifying
y = -3.6
Subproblem 2
Set the factor '(4 + -1y)' equal to zero and attempt to solve:

Simplifying
4 + -1y = 0

Solving
4 + -1y = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1y = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1y = 0 + -4
-1y = 0 + -4

Combine like terms: 0 + -4 = -4
-1y = -4

Divide each side by '-1'.
y = 4

Simplifying
y = 4
Solution
y = {-3.6, 4}