6x^2-8x=2x+9

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Solution for 6x^2-8x=2x+9 equation:


Simplifying
6x2 + -8x = 2x + 9

Reorder the terms:
-8x + 6x2 = 2x + 9

Reorder the terms:
-8x + 6x2 = 9 + 2x

Solving
-8x + 6x2 = 9 + 2x

Solving for variable 'x'.

Reorder the terms:
-9 + -8x + -2x + 6x2 = 9 + 2x + -9 + -2x

Combine like terms: -8x + -2x = -10x
-9 + -10x + 6x2 = 9 + 2x + -9 + -2x

Reorder the terms:
-9 + -10x + 6x2 = 9 + -9 + 2x + -2x

Combine like terms: 9 + -9 = 0
-9 + -10x + 6x2 = 0 + 2x + -2x
-9 + -10x + 6x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-9 + -10x + 6x2 = 0

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

Divide each side by '6'.
-1.5 + -1.666666667x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -1.666666667x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -1.666666667x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -1.666666667x + x2 = 0 + 1.5
-1.666666667x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-1.666666667x + x2 = 1.5

The x term is -1.666666667x.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667x + 0.6944444447 + x2 = 1.5 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667x + x2 = 1.5 + 0.6944444447

Combine like terms: 1.5 + 0.6944444447 = 2.1944444447
0.6944444447 + -1.666666667x + x2 = 2.1944444447

Factor a perfect square on the left side:
(x + -0.8333333335)(x + -0.8333333335) = 2.1944444447

Calculate the square root of the right side: 1.481365736

Break this problem into two subproblems by setting 
(x + -0.8333333335) equal to 1.481365736 and -1.481365736.

Subproblem 1

x + -0.8333333335 = 1.481365736 Simplifying x + -0.8333333335 = 1.481365736 Reorder the terms: -0.8333333335 + x = 1.481365736 Solving -0.8333333335 + x = 1.481365736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = 1.481365736 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = 1.481365736 + 0.8333333335 x = 1.481365736 + 0.8333333335 Combine like terms: 1.481365736 + 0.8333333335 = 2.3146990695 x = 2.3146990695 Simplifying x = 2.3146990695

Subproblem 2

x + -0.8333333335 = -1.481365736 Simplifying x + -0.8333333335 = -1.481365736 Reorder the terms: -0.8333333335 + x = -1.481365736 Solving -0.8333333335 + x = -1.481365736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = -1.481365736 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = -1.481365736 + 0.8333333335 x = -1.481365736 + 0.8333333335 Combine like terms: -1.481365736 + 0.8333333335 = -0.6480324025 x = -0.6480324025 Simplifying x = -0.6480324025

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3146990695, -0.6480324025}

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