8x^2-24x=-13

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Solution for 8x^2-24x=-13 equation:


Simplifying
8x2 + -24x = -13

Reorder the terms:
-24x + 8x2 = -13

Solving
-24x + 8x2 = -13

Solving for variable 'x'.

Reorder the terms:
13 + -24x + 8x2 = -13 + 13

Combine like terms: -13 + 13 = 0
13 + -24x + 8x2 = 0

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

Divide each side by '8'.
1.625 + -3x + x2 = 0

Move the constant term to the right:

Add '-1.625' to each side of the equation.
1.625 + -3x + -1.625 + x2 = 0 + -1.625

Reorder the terms:
1.625 + -1.625 + -3x + x2 = 0 + -1.625

Combine like terms: 1.625 + -1.625 = 0.000
0.000 + -3x + x2 = 0 + -1.625
-3x + x2 = 0 + -1.625

Combine like terms: 0 + -1.625 = -1.625
-3x + x2 = -1.625

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -1.625 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1.625 + 2.25

Combine like terms: -1.625 + 2.25 = 0.625
2.25 + -3x + x2 = 0.625

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.625

Calculate the square root of the right side: 0.790569415

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.790569415 and -0.790569415.

Subproblem 1

x + -1.5 = 0.790569415 Simplifying x + -1.5 = 0.790569415 Reorder the terms: -1.5 + x = 0.790569415 Solving -1.5 + x = 0.790569415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 0.790569415 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.790569415 + 1.5 x = 0.790569415 + 1.5 Combine like terms: 0.790569415 + 1.5 = 2.290569415 x = 2.290569415 Simplifying x = 2.290569415

Subproblem 2

x + -1.5 = -0.790569415 Simplifying x + -1.5 = -0.790569415 Reorder the terms: -1.5 + x = -0.790569415 Solving -1.5 + x = -0.790569415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -0.790569415 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.790569415 + 1.5 x = -0.790569415 + 1.5 Combine like terms: -0.790569415 + 1.5 = 0.709430585 x = 0.709430585 Simplifying x = 0.709430585

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.290569415, 0.709430585}

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