20x^2+31x-3=-15

Solution for 20x^2+31x-3=-15 equation:

Simplifying
20x2 + 31x + -3 = -15

Reorder the terms:
-3 + 31x + 20x2 = -15

Solving
-3 + 31x + 20x2 = -15

Solving for variable 'x'.

Reorder the terms:
-3 + 15 + 31x + 20x2 = -15 + 15

Combine like terms: -3 + 15 = 12
12 + 31x + 20x2 = -15 + 15

Combine like terms: -15 + 15 = 0
12 + 31x + 20x2 = 0

Factor a trinomial.
(4 + 5x)(3 + 4x) = 0

Subproblem 1
Set the factor '(4 + 5x)' equal to zero and attempt to solve:

Simplifying
4 + 5x = 0

Solving
4 + 5x = 0

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

Add '-4' to each side of the equation.
4 + -4 + 5x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 5x = 0 + -4
5x = 0 + -4

Combine like terms: 0 + -4 = -4
5x = -4

Divide each side by '5'.
x = -0.8

Simplifying
x = -0.8
Subproblem 2
Set the factor '(3 + 4x)' equal to zero and attempt to solve:

Simplifying
3 + 4x = 0

Solving
3 + 4x = 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 + 4x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = 0 + -3
4x = 0 + -3

Combine like terms: 0 + -3 = -3
4x = -3

Divide each side by '4'.
x = -0.75

Simplifying
x = -0.75
Solution
x = {-0.8, -0.75}