-8x^2+59x-8=0

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Solution for -8x^2+59x-8=0 equation:


Simplifying
-8x2 + 59x + -8 = 0

Reorder the terms:
-8 + 59x + -8x2 = 0

Solving
-8 + 59x + -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'.
1 + -7.375x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -7.375x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -7.375x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -7.375x + x2 = 0 + -1
-7.375x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-7.375x + x2 = -1

The x term is -7.375x.  Take half its coefficient (-3.6875).
Square it (13.59765625) and add it to both sides.

Add '13.59765625' to each side of the equation.
-7.375x + 13.59765625 + x2 = -1 + 13.59765625

Reorder the terms:
13.59765625 + -7.375x + x2 = -1 + 13.59765625

Combine like terms: -1 + 13.59765625 = 12.59765625
13.59765625 + -7.375x + x2 = 12.59765625

Factor a perfect square on the left side:
(x + -3.6875)(x + -3.6875) = 12.59765625

Calculate the square root of the right side: 3.549317716

Break this problem into two subproblems by setting 
(x + -3.6875) equal to 3.549317716 and -3.549317716.

Subproblem 1

x + -3.6875 = 3.549317716 Simplifying x + -3.6875 = 3.549317716 Reorder the terms: -3.6875 + x = 3.549317716 Solving -3.6875 + x = 3.549317716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.6875' to each side of the equation. -3.6875 + 3.6875 + x = 3.549317716 + 3.6875 Combine like terms: -3.6875 + 3.6875 = 0.0000 0.0000 + x = 3.549317716 + 3.6875 x = 3.549317716 + 3.6875 Combine like terms: 3.549317716 + 3.6875 = 7.236817716 x = 7.236817716 Simplifying x = 7.236817716

Subproblem 2

x + -3.6875 = -3.549317716 Simplifying x + -3.6875 = -3.549317716 Reorder the terms: -3.6875 + x = -3.549317716 Solving -3.6875 + x = -3.549317716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.6875' to each side of the equation. -3.6875 + 3.6875 + x = -3.549317716 + 3.6875 Combine like terms: -3.6875 + 3.6875 = 0.0000 0.0000 + x = -3.549317716 + 3.6875 x = -3.549317716 + 3.6875 Combine like terms: -3.549317716 + 3.6875 = 0.138182284 x = 0.138182284 Simplifying x = 0.138182284

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.236817716, 0.138182284}

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