(8x^2-2x-27)+(8x^2+4x)=

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Solution for (8x^2-2x-27)+(8x^2+4x)= equation:


Simplifying
(8x2 + -2x + -27) + (8x2 + 4x) = 0

Reorder the terms:
(-27 + -2x + 8x2) + (8x2 + 4x) = 0

Remove parenthesis around (-27 + -2x + 8x2)
-27 + -2x + 8x2 + (8x2 + 4x) = 0

Reorder the terms:
-27 + -2x + 8x2 + (4x + 8x2) = 0

Remove parenthesis around (4x + 8x2)
-27 + -2x + 8x2 + 4x + 8x2 = 0

Reorder the terms:
-27 + -2x + 4x + 8x2 + 8x2 = 0

Combine like terms: -2x + 4x = 2x
-27 + 2x + 8x2 + 8x2 = 0

Combine like terms: 8x2 + 8x2 = 16x2
-27 + 2x + 16x2 = 0

Solving
-27 + 2x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
-1.6875 + 0.125x + x2 = 0

Move the constant term to the right:

Add '1.6875' to each side of the equation.
-1.6875 + 0.125x + 1.6875 + x2 = 0 + 1.6875

Reorder the terms:
-1.6875 + 1.6875 + 0.125x + x2 = 0 + 1.6875

Combine like terms: -1.6875 + 1.6875 = 0.0000
0.0000 + 0.125x + x2 = 0 + 1.6875
0.125x + x2 = 0 + 1.6875

Combine like terms: 0 + 1.6875 = 1.6875
0.125x + x2 = 1.6875

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 = 1.6875 + 0.00390625

Reorder the terms:
0.00390625 + 0.125x + x2 = 1.6875 + 0.00390625

Combine like terms: 1.6875 + 0.00390625 = 1.69140625
0.00390625 + 0.125x + x2 = 1.69140625

Factor a perfect square on the left side:
(x + 0.0625)(x + 0.0625) = 1.69140625

Calculate the square root of the right side: 1.300540753

Break this problem into two subproblems by setting 
(x + 0.0625) equal to 1.300540753 and -1.300540753.

Subproblem 1

x + 0.0625 = 1.300540753 Simplifying x + 0.0625 = 1.300540753 Reorder the terms: 0.0625 + x = 1.300540753 Solving 0.0625 + x = 1.300540753 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 = 1.300540753 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = 1.300540753 + -0.0625 x = 1.300540753 + -0.0625 Combine like terms: 1.300540753 + -0.0625 = 1.238040753 x = 1.238040753 Simplifying x = 1.238040753

Subproblem 2

x + 0.0625 = -1.300540753 Simplifying x + 0.0625 = -1.300540753 Reorder the terms: 0.0625 + x = -1.300540753 Solving 0.0625 + x = -1.300540753 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 = -1.300540753 + -0.0625 Combine like terms: 0.0625 + -0.0625 = 0.0000 0.0000 + x = -1.300540753 + -0.0625 x = -1.300540753 + -0.0625 Combine like terms: -1.300540753 + -0.0625 = -1.363040753 x = -1.363040753 Simplifying x = -1.363040753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.238040753, -1.363040753}

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