6x^2=2x^2-16x+39

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Solution for 6x^2=2x^2-16x+39 equation:


Simplifying
6x2 = 2x2 + -16x + 39

Reorder the terms:
6x2 = 39 + -16x + 2x2

Solving
6x2 = 39 + -16x + 2x2

Solving for variable 'x'.

Reorder the terms:
-39 + 16x + 6x2 + -2x2 = 39 + -16x + 2x2 + -39 + 16x + -2x2

Combine like terms: 6x2 + -2x2 = 4x2
-39 + 16x + 4x2 = 39 + -16x + 2x2 + -39 + 16x + -2x2

Reorder the terms:
-39 + 16x + 4x2 = 39 + -39 + -16x + 16x + 2x2 + -2x2

Combine like terms: 39 + -39 = 0
-39 + 16x + 4x2 = 0 + -16x + 16x + 2x2 + -2x2
-39 + 16x + 4x2 = -16x + 16x + 2x2 + -2x2

Combine like terms: -16x + 16x = 0
-39 + 16x + 4x2 = 0 + 2x2 + -2x2
-39 + 16x + 4x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-39 + 16x + 4x2 = 0

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

Divide each side by '4'.
-9.75 + 4x + x2 = 0

Move the constant term to the right:

Add '9.75' to each side of the equation.
-9.75 + 4x + 9.75 + x2 = 0 + 9.75

Reorder the terms:
-9.75 + 9.75 + 4x + x2 = 0 + 9.75

Combine like terms: -9.75 + 9.75 = 0.00
0.00 + 4x + x2 = 0 + 9.75
4x + x2 = 0 + 9.75

Combine like terms: 0 + 9.75 = 9.75
4x + x2 = 9.75

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 9.75 + 4

Reorder the terms:
4 + 4x + x2 = 9.75 + 4

Combine like terms: 9.75 + 4 = 13.75
4 + 4x + x2 = 13.75

Factor a perfect square on the left side:
(x + 2)(x + 2) = 13.75

Calculate the square root of the right side: 3.708099244

Break this problem into two subproblems by setting 
(x + 2) equal to 3.708099244 and -3.708099244.

Subproblem 1

x + 2 = 3.708099244 Simplifying x + 2 = 3.708099244 Reorder the terms: 2 + x = 3.708099244 Solving 2 + x = 3.708099244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 3.708099244 + -2 Combine like terms: 2 + -2 = 0 0 + x = 3.708099244 + -2 x = 3.708099244 + -2 Combine like terms: 3.708099244 + -2 = 1.708099244 x = 1.708099244 Simplifying x = 1.708099244

Subproblem 2

x + 2 = -3.708099244 Simplifying x + 2 = -3.708099244 Reorder the terms: 2 + x = -3.708099244 Solving 2 + x = -3.708099244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -3.708099244 + -2 Combine like terms: 2 + -2 = 0 0 + x = -3.708099244 + -2 x = -3.708099244 + -2 Combine like terms: -3.708099244 + -2 = -5.708099244 x = -5.708099244 Simplifying x = -5.708099244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.708099244, -5.708099244}

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