8x^2+1x-64=0

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Solution for 8x^2+1x-64=0 equation:


Simplifying
8x2 + 1x + -64 = 0

Reorder the terms:
-64 + 1x + 8x2 = 0

Solving
-64 + 1x + 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'.
-8 + 0.125x + x2 = 0

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 0.125x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 0.125x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 0.125x + x2 = 0 + 8
0.125x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
0.125x + x2 = 8

The x term is 0.125x.  Take half its coefficient (0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
0.125x + 0.00390625 + x2 = 8 + 0.00390625

Reorder the terms:
0.00390625 + 0.125x + x2 = 8 + 0.00390625

Combine like terms: 8 + 0.00390625 = 8.00390625
0.00390625 + 0.125x + x2 = 8.00390625

Factor a perfect square on the left side:
(x + 0.0625)(x + 0.0625) = 8.00390625

Calculate the square root of the right side: 2.829117574

Break this problem into two subproblems by setting 
(x + 0.0625) equal to 2.829117574 and -2.829117574.

Subproblem 1

x + 0.0625 = 2.829117574 Simplifying x + 0.0625 = 2.829117574 Reorder the terms: 0.0625 + x = 2.829117574 Solving 0.0625 + x = 2.829117574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0625' to each side of the equation. 0.0625 + -0.0625 + x = 2.829117574 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = 2.829117574 + -0.0625 x = 2.829117574 + -0.0625 Combine like terms: 2.829117574 + -0.0625 = 2.766617574 x = 2.766617574 Simplifying x = 2.766617574

Subproblem 2

x + 0.0625 = -2.829117574 Simplifying x + 0.0625 = -2.829117574 Reorder the terms: 0.0625 + x = -2.829117574 Solving 0.0625 + x = -2.829117574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0625' to each side of the equation. 0.0625 + -0.0625 + x = -2.829117574 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = -2.829117574 + -0.0625 x = -2.829117574 + -0.0625 Combine like terms: -2.829117574 + -0.0625 = -2.891617574 x = -2.891617574 Simplifying x = -2.891617574

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.766617574, -2.891617574}

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