12x^2-24x=x+8

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Solution for 12x^2-24x=x+8 equation:


Simplifying
12x2 + -24x = x + 8

Reorder the terms:
-24x + 12x2 = x + 8

Reorder the terms:
-24x + 12x2 = 8 + x

Solving
-24x + 12x2 = 8 + x

Solving for variable 'x'.

Reorder the terms:
-8 + -24x + -1x + 12x2 = 8 + x + -8 + -1x

Combine like terms: -24x + -1x = -25x
-8 + -25x + 12x2 = 8 + x + -8 + -1x

Reorder the terms:
-8 + -25x + 12x2 = 8 + -8 + x + -1x

Combine like terms: 8 + -8 = 0
-8 + -25x + 12x2 = 0 + x + -1x
-8 + -25x + 12x2 = x + -1x

Combine like terms: x + -1x = 0
-8 + -25x + 12x2 = 0

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

Divide each side by '12'.
-0.6666666667 + -2.083333333x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -2.083333333x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -2.083333333x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -2.083333333x + x2 = 0 + 0.6666666667
-2.083333333x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-2.083333333x + x2 = 0.6666666667

The x term is -2.083333333x.  Take half its coefficient (-1.041666667).
Square it (1.085069445) and add it to both sides.

Add '1.085069445' to each side of the equation.
-2.083333333x + 1.085069445 + x2 = 0.6666666667 + 1.085069445

Reorder the terms:
1.085069445 + -2.083333333x + x2 = 0.6666666667 + 1.085069445

Combine like terms: 0.6666666667 + 1.085069445 = 1.7517361117
1.085069445 + -2.083333333x + x2 = 1.7517361117

Factor a perfect square on the left side:
(x + -1.041666667)(x + -1.041666667) = 1.7517361117

Calculate the square root of the right side: 1.323531681

Break this problem into two subproblems by setting 
(x + -1.041666667) equal to 1.323531681 and -1.323531681.

Subproblem 1

x + -1.041666667 = 1.323531681 Simplifying x + -1.041666667 = 1.323531681 Reorder the terms: -1.041666667 + x = 1.323531681 Solving -1.041666667 + x = 1.323531681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.041666667' to each side of the equation. -1.041666667 + 1.041666667 + x = 1.323531681 + 1.041666667 Combine like terms: -1.041666667 + 1.041666667 = 0.000000000 0.000000000 + x = 1.323531681 + 1.041666667 x = 1.323531681 + 1.041666667 Combine like terms: 1.323531681 + 1.041666667 = 2.365198348 x = 2.365198348 Simplifying x = 2.365198348

Subproblem 2

x + -1.041666667 = -1.323531681 Simplifying x + -1.041666667 = -1.323531681 Reorder the terms: -1.041666667 + x = -1.323531681 Solving -1.041666667 + x = -1.323531681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.041666667' to each side of the equation. -1.041666667 + 1.041666667 + x = -1.323531681 + 1.041666667 Combine like terms: -1.041666667 + 1.041666667 = 0.000000000 0.000000000 + x = -1.323531681 + 1.041666667 x = -1.323531681 + 1.041666667 Combine like terms: -1.323531681 + 1.041666667 = -0.281865014 x = -0.281865014 Simplifying x = -0.281865014

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.365198348, -0.281865014}

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