3x^2-64=2x

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Solution for 3x^2-64=2x equation:


Simplifying
3x2 + -64 = 2x

Reorder the terms:
-64 + 3x2 = 2x

Solving
-64 + 3x2 = 2x

Solving for variable 'x'.

Reorder the terms:
-64 + -2x + 3x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-64 + -2x + 3x2 = 0

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

Divide each side by '3'.
-21.33333333 + -0.6666666667x + x2 = 0

Move the constant term to the right:

Add '21.33333333' to each side of the equation.
-21.33333333 + -0.6666666667x + 21.33333333 + x2 = 0 + 21.33333333

Reorder the terms:
-21.33333333 + 21.33333333 + -0.6666666667x + x2 = 0 + 21.33333333

Combine like terms: -21.33333333 + 21.33333333 = 0.00000000
0.00000000 + -0.6666666667x + x2 = 0 + 21.33333333
-0.6666666667x + x2 = 0 + 21.33333333

Combine like terms: 0 + 21.33333333 = 21.33333333
-0.6666666667x + x2 = 21.33333333

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = 21.33333333 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = 21.33333333 + 0.1111111112

Combine like terms: 21.33333333 + 0.1111111112 = 21.4444444412
0.1111111112 + -0.6666666667x + x2 = 21.4444444412

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 21.4444444412

Calculate the square root of the right side: 4.630814663

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 4.630814663 and -4.630814663.

Subproblem 1

x + -0.3333333334 = 4.630814663 Simplifying x + -0.3333333334 = 4.630814663 Reorder the terms: -0.3333333334 + x = 4.630814663 Solving -0.3333333334 + x = 4.630814663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 4.630814663 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 4.630814663 + 0.3333333334 x = 4.630814663 + 0.3333333334 Combine like terms: 4.630814663 + 0.3333333334 = 4.9641479964 x = 4.9641479964 Simplifying x = 4.9641479964

Subproblem 2

x + -0.3333333334 = -4.630814663 Simplifying x + -0.3333333334 = -4.630814663 Reorder the terms: -0.3333333334 + x = -4.630814663 Solving -0.3333333334 + x = -4.630814663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -4.630814663 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -4.630814663 + 0.3333333334 x = -4.630814663 + 0.3333333334 Combine like terms: -4.630814663 + 0.3333333334 = -4.2974813296 x = -4.2974813296 Simplifying x = -4.2974813296

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.9641479964, -4.2974813296}

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