8x-8+8x=x^2-x

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


Simplifying
8x + -8 + 8x = x2 + -1x

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

Combine like terms: 8x + 8x = 16x
-8 + 16x = x2 + -1x

Reorder the terms:
-8 + 16x = -1x + x2

Solving
-8 + 16x = -1x + x2

Solving for variable 'x'.

Combine like terms: 16x + x = 17x
-8 + 17x + -1x2 = -1x + x2 + x + -1x2

Reorder the terms:
-8 + 17x + -1x2 = -1x + x + x2 + -1x2

Combine like terms: -1x + x = 0
-8 + 17x + -1x2 = 0 + x2 + -1x2
-8 + 17x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-8 + 17x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
8 + -17x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -17x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -17x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -17x + x2 = 0 + -8
-17x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-17x + x2 = -8

The x term is -17x.  Take half its coefficient (-8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
-17x + 72.25 + x2 = -8 + 72.25

Reorder the terms:
72.25 + -17x + x2 = -8 + 72.25

Combine like terms: -8 + 72.25 = 64.25
72.25 + -17x + x2 = 64.25

Factor a perfect square on the left side:
(x + -8.5)(x + -8.5) = 64.25

Calculate the square root of the right side: 8.015609771

Break this problem into two subproblems by setting 
(x + -8.5) equal to 8.015609771 and -8.015609771.

Subproblem 1

x + -8.5 = 8.015609771 Simplifying x + -8.5 = 8.015609771 Reorder the terms: -8.5 + x = 8.015609771 Solving -8.5 + x = 8.015609771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = 8.015609771 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = 8.015609771 + 8.5 x = 8.015609771 + 8.5 Combine like terms: 8.015609771 + 8.5 = 16.515609771 x = 16.515609771 Simplifying x = 16.515609771

Subproblem 2

x + -8.5 = -8.015609771 Simplifying x + -8.5 = -8.015609771 Reorder the terms: -8.5 + x = -8.015609771 Solving -8.5 + x = -8.015609771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = -8.015609771 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = -8.015609771 + 8.5 x = -8.015609771 + 8.5 Combine like terms: -8.015609771 + 8.5 = 0.484390229 x = 0.484390229 Simplifying x = 0.484390229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.515609771, 0.484390229}

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