0=2x^2+x-15

Solution for 0=2x^2+x-15 equation:

Simplifying
0 = 2x2 + x + -15

Reorder the terms:
0 = -15 + x + 2x2

Solving
0 = -15 + x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 15 = 15
15 + -1x + -2x2 = -15 + x + 2x2 + 15 + -1x + -2x2

Reorder the terms:
15 + -1x + -2x2 = -15 + 15 + x + -1x + 2x2 + -2x2

Combine like terms: -15 + 15 = 0
15 + -1x + -2x2 = 0 + x + -1x + 2x2 + -2x2
15 + -1x + -2x2 = x + -1x + 2x2 + -2x2

Combine like terms: x + -1x = 0
15 + -1x + -2x2 = 0 + 2x2 + -2x2
15 + -1x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
15 + -1x + -2x2 = 0

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

Subproblem 1
Set the factor '(5 + -2x)' equal to zero and attempt to solve:

Simplifying
5 + -2x = 0

Solving
5 + -2x = 0

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

Add '-5' to each side of the equation.
5 + -5 + -2x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -2x = 0 + -5
-2x = 0 + -5

Combine like terms: 0 + -5 = -5
-2x = -5

Divide each side by '-2'.
x = 2.5

Simplifying
x = 2.5
Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 0

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

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

Combine like terms: 3 + -3 = 0
0 + x = 0 + -3
x = 0 + -3

Combine like terms: 0 + -3 = -3
x = -3

Simplifying
x = -3
Solution
x = {2.5, -3}