8x^2-8x-49=0

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Solution for 8x^2-8x-49=0 equation:


Simplifying
8x2 + -8x + -49 = 0

Reorder the terms:
-49 + -8x + 8x2 = 0

Solving
-49 + -8x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-6.125 + -1x + x2 = 0

Move the constant term to the right:

Add '6.125' to each side of the equation.
-6.125 + -1x + 6.125 + x2 = 0 + 6.125

Reorder the terms:
-6.125 + 6.125 + -1x + x2 = 0 + 6.125

Combine like terms: -6.125 + 6.125 = 0.000
0.000 + -1x + x2 = 0 + 6.125
-1x + x2 = 0 + 6.125

Combine like terms: 0 + 6.125 = 6.125
-1x + x2 = 6.125

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 6.125 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 6.125 + 0.25

Combine like terms: 6.125 + 0.25 = 6.375
0.25 + -1x + x2 = 6.375

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 6.375

Calculate the square root of the right side: 2.524876235

Break this problem into two subproblems by setting 
(x + -0.5) equal to 2.524876235 and -2.524876235.

Subproblem 1

x + -0.5 = 2.524876235 Simplifying x + -0.5 = 2.524876235 Reorder the terms: -0.5 + x = 2.524876235 Solving -0.5 + x = 2.524876235 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 2.524876235 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 2.524876235 + 0.5 x = 2.524876235 + 0.5 Combine like terms: 2.524876235 + 0.5 = 3.024876235 x = 3.024876235 Simplifying x = 3.024876235

Subproblem 2

x + -0.5 = -2.524876235 Simplifying x + -0.5 = -2.524876235 Reorder the terms: -0.5 + x = -2.524876235 Solving -0.5 + x = -2.524876235 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -2.524876235 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -2.524876235 + 0.5 x = -2.524876235 + 0.5 Combine like terms: -2.524876235 + 0.5 = -2.024876235 x = -2.024876235 Simplifying x = -2.024876235

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.024876235, -2.024876235}

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