4x^2+64x+64=x+8

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Solution for 4x^2+64x+64=x+8 equation:


Simplifying
4x2 + 64x + 64 = x + 8

Reorder the terms:
64 + 64x + 4x2 = x + 8

Reorder the terms:
64 + 64x + 4x2 = 8 + x

Solving
64 + 64x + 4x2 = 8 + x

Solving for variable 'x'.

Reorder the terms:
64 + -8 + 64x + -1x + 4x2 = 8 + x + -8 + -1x

Combine like terms: 64 + -8 = 56
56 + 64x + -1x + 4x2 = 8 + x + -8 + -1x

Combine like terms: 64x + -1x = 63x
56 + 63x + 4x2 = 8 + x + -8 + -1x

Reorder the terms:
56 + 63x + 4x2 = 8 + -8 + x + -1x

Combine like terms: 8 + -8 = 0
56 + 63x + 4x2 = 0 + x + -1x
56 + 63x + 4x2 = x + -1x

Combine like terms: x + -1x = 0
56 + 63x + 4x2 = 0

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

Divide each side by '4'.
14 + 15.75x + x2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + 15.75x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + 15.75x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + 15.75x + x2 = 0 + -14
15.75x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
15.75x + x2 = -14

The x term is 15.75x.  Take half its coefficient (7.875).
Square it (62.015625) and add it to both sides.

Add '62.015625' to each side of the equation.
15.75x + 62.015625 + x2 = -14 + 62.015625

Reorder the terms:
62.015625 + 15.75x + x2 = -14 + 62.015625

Combine like terms: -14 + 62.015625 = 48.015625
62.015625 + 15.75x + x2 = 48.015625

Factor a perfect square on the left side:
(x + 7.875)(x + 7.875) = 48.015625

Calculate the square root of the right side: 6.929330776

Break this problem into two subproblems by setting 
(x + 7.875) equal to 6.929330776 and -6.929330776.

Subproblem 1

x + 7.875 = 6.929330776 Simplifying x + 7.875 = 6.929330776 Reorder the terms: 7.875 + x = 6.929330776 Solving 7.875 + x = 6.929330776 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.875' to each side of the equation. 7.875 + -7.875 + x = 6.929330776 + -7.875 Combine like terms: 7.875 + -7.875 = 0.000 0.000 + x = 6.929330776 + -7.875 x = 6.929330776 + -7.875 Combine like terms: 6.929330776 + -7.875 = -0.945669224 x = -0.945669224 Simplifying x = -0.945669224

Subproblem 2

x + 7.875 = -6.929330776 Simplifying x + 7.875 = -6.929330776 Reorder the terms: 7.875 + x = -6.929330776 Solving 7.875 + x = -6.929330776 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.875' to each side of the equation. 7.875 + -7.875 + x = -6.929330776 + -7.875 Combine like terms: 7.875 + -7.875 = 0.000 0.000 + x = -6.929330776 + -7.875 x = -6.929330776 + -7.875 Combine like terms: -6.929330776 + -7.875 = -14.804330776 x = -14.804330776 Simplifying x = -14.804330776

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.945669224, -14.804330776}

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