0=15x^2+24x-32

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Solution for 0=15x^2+24x-32 equation:


Simplifying
0 = 15x2 + 24x + -32

Reorder the terms:
0 = -32 + 24x + 15x2

Solving
0 = -32 + 24x + 15x2

Solving for variable 'x'.

Combine like terms: 0 + 32 = 32
32 + -24x + -15x2 = -32 + 24x + 15x2 + 32 + -24x + -15x2

Reorder the terms:
32 + -24x + -15x2 = -32 + 32 + 24x + -24x + 15x2 + -15x2

Combine like terms: -32 + 32 = 0
32 + -24x + -15x2 = 0 + 24x + -24x + 15x2 + -15x2
32 + -24x + -15x2 = 24x + -24x + 15x2 + -15x2

Combine like terms: 24x + -24x = 0
32 + -24x + -15x2 = 0 + 15x2 + -15x2
32 + -24x + -15x2 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
32 + -24x + -15x2 = 0

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

Divide each side by '-15'.
-2.133333333 + 1.6x + x2 = 0

Move the constant term to the right:

Add '2.133333333' to each side of the equation.
-2.133333333 + 1.6x + 2.133333333 + x2 = 0 + 2.133333333

Reorder the terms:
-2.133333333 + 2.133333333 + 1.6x + x2 = 0 + 2.133333333

Combine like terms: -2.133333333 + 2.133333333 = 0.000000000
0.000000000 + 1.6x + x2 = 0 + 2.133333333
1.6x + x2 = 0 + 2.133333333

Combine like terms: 0 + 2.133333333 = 2.133333333
1.6x + x2 = 2.133333333

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 2.133333333 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 2.133333333 + 0.64

Combine like terms: 2.133333333 + 0.64 = 2.773333333
0.64 + 1.6x + x2 = 2.773333333

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 2.773333333

Calculate the square root of the right side: 1.665332799

Break this problem into two subproblems by setting 
(x + 0.8) equal to 1.665332799 and -1.665332799.

Subproblem 1

x + 0.8 = 1.665332799 Simplifying x + 0.8 = 1.665332799 Reorder the terms: 0.8 + x = 1.665332799 Solving 0.8 + x = 1.665332799 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 1.665332799 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 1.665332799 + -0.8 x = 1.665332799 + -0.8 Combine like terms: 1.665332799 + -0.8 = 0.865332799 x = 0.865332799 Simplifying x = 0.865332799

Subproblem 2

x + 0.8 = -1.665332799 Simplifying x + 0.8 = -1.665332799 Reorder the terms: 0.8 + x = -1.665332799 Solving 0.8 + x = -1.665332799 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -1.665332799 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -1.665332799 + -0.8 x = -1.665332799 + -0.8 Combine like terms: -1.665332799 + -0.8 = -2.465332799 x = -2.465332799 Simplifying x = -2.465332799

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.865332799, -2.465332799}

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