15e^2-7e-2=0

Solution for 15e^2-7e-2=0 equation:

Simplifying
15e2 + -7e + -2 = 0

Reorder the terms:
-2 + -7e + 15e2 = 0

Solving
-2 + -7e + 15e2 = 0

Solving for variable 'e'.

Factor a trinomial.
(-1 + -5e)(2 + -3e) = 0

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

Simplifying
-1 + -5e = 0

Solving
-1 + -5e = 0

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

Add '1' to each side of the equation.
-1 + 1 + -5e = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -5e = 0 + 1
-5e = 0 + 1

Combine like terms: 0 + 1 = 1
-5e = 1

Divide each side by '-5'.
e = -0.2

Simplifying
e = -0.2
Subproblem 2
Set the factor '(2 + -3e)' equal to zero and attempt to solve:

Simplifying
2 + -3e = 0

Solving
2 + -3e = 0

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

Add '-2' to each side of the equation.
2 + -2 + -3e = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -3e = 0 + -2
-3e = 0 + -2

Combine like terms: 0 + -2 = -2
-3e = -2

Divide each side by '-3'.
e = 0.6666666667

Simplifying
e = 0.6666666667
Solution
e = {-0.2, 0.6666666667}