0=15x^2+14x-2

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Solution for 0=15x^2+14x-2 equation:


Simplifying
0 = 15x2 + 14x + -2

Reorder the terms:
0 = -2 + 14x + 15x2

Solving
0 = -2 + 14x + 15x2

Solving for variable 'x'.

Combine like terms: 0 + 2 = 2
2 + -14x + -15x2 = -2 + 14x + 15x2 + 2 + -14x + -15x2

Reorder the terms:
2 + -14x + -15x2 = -2 + 2 + 14x + -14x + 15x2 + -15x2

Combine like terms: -2 + 2 = 0
2 + -14x + -15x2 = 0 + 14x + -14x + 15x2 + -15x2
2 + -14x + -15x2 = 14x + -14x + 15x2 + -15x2

Combine like terms: 14x + -14x = 0
2 + -14x + -15x2 = 0 + 15x2 + -15x2
2 + -14x + -15x2 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
2 + -14x + -15x2 = 0

Begin completing the square.  Divide all terms by
-15 the coefficient of the squared term: 

Divide each side by '-15'.
-0.1333333333 + 0.9333333333x + x2 = 0

Move the constant term to the right:

Add '0.1333333333' to each side of the equation.
-0.1333333333 + 0.9333333333x + 0.1333333333 + x2 = 0 + 0.1333333333

Reorder the terms:
-0.1333333333 + 0.1333333333 + 0.9333333333x + x2 = 0 + 0.1333333333

Combine like terms: -0.1333333333 + 0.1333333333 = 0.0000000000
0.0000000000 + 0.9333333333x + x2 = 0 + 0.1333333333
0.9333333333x + x2 = 0 + 0.1333333333

Combine like terms: 0 + 0.1333333333 = 0.1333333333
0.9333333333x + x2 = 0.1333333333

The x term is 0.9333333333x.  Take half its coefficient (0.4666666667).
Square it (0.2177777778) and add it to both sides.

Add '0.2177777778' to each side of the equation.
0.9333333333x + 0.2177777778 + x2 = 0.1333333333 + 0.2177777778

Reorder the terms:
0.2177777778 + 0.9333333333x + x2 = 0.1333333333 + 0.2177777778

Combine like terms: 0.1333333333 + 0.2177777778 = 0.3511111111
0.2177777778 + 0.9333333333x + x2 = 0.3511111111

Factor a perfect square on the left side:
(x + 0.4666666667)(x + 0.4666666667) = 0.3511111111

Calculate the square root of the right side: 0.592546294

Break this problem into two subproblems by setting 
(x + 0.4666666667) equal to 0.592546294 and -0.592546294.

Subproblem 1

x + 0.4666666667 = 0.592546294 Simplifying x + 0.4666666667 = 0.592546294 Reorder the terms: 0.4666666667 + x = 0.592546294 Solving 0.4666666667 + x = 0.592546294 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = 0.592546294 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = 0.592546294 + -0.4666666667 x = 0.592546294 + -0.4666666667 Combine like terms: 0.592546294 + -0.4666666667 = 0.1258796273 x = 0.1258796273 Simplifying x = 0.1258796273

Subproblem 2

x + 0.4666666667 = -0.592546294 Simplifying x + 0.4666666667 = -0.592546294 Reorder the terms: 0.4666666667 + x = -0.592546294 Solving 0.4666666667 + x = -0.592546294 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = -0.592546294 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = -0.592546294 + -0.4666666667 x = -0.592546294 + -0.4666666667 Combine like terms: -0.592546294 + -0.4666666667 = -1.0592129607 x = -1.0592129607 Simplifying x = -1.0592129607

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1258796273, -1.0592129607}

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