3x^2-20x=4x-7x-6

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Solution for 3x^2-20x=4x-7x-6 equation:


Simplifying
3x2 + -20x = 4x + -7x + -6

Reorder the terms:
-20x + 3x2 = 4x + -7x + -6

Reorder the terms:
-20x + 3x2 = -6 + 4x + -7x

Combine like terms: 4x + -7x = -3x
-20x + 3x2 = -6 + -3x

Solving
-20x + 3x2 = -6 + -3x

Solving for variable 'x'.

Reorder the terms:
6 + -20x + 3x + 3x2 = -6 + -3x + 6 + 3x

Combine like terms: -20x + 3x = -17x
6 + -17x + 3x2 = -6 + -3x + 6 + 3x

Reorder the terms:
6 + -17x + 3x2 = -6 + 6 + -3x + 3x

Combine like terms: -6 + 6 = 0
6 + -17x + 3x2 = 0 + -3x + 3x
6 + -17x + 3x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
6 + -17x + 3x2 = 0

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

Divide each side by '3'.
2 + -5.666666667x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -5.666666667x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -5.666666667x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -5.666666667x + x2 = 0 + -2
-5.666666667x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-5.666666667x + x2 = -2

The x term is -5.666666667x.  Take half its coefficient (-2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
-5.666666667x + 8.027777782 + x2 = -2 + 8.027777782

Reorder the terms:
8.027777782 + -5.666666667x + x2 = -2 + 8.027777782

Combine like terms: -2 + 8.027777782 = 6.027777782
8.027777782 + -5.666666667x + x2 = 6.027777782

Factor a perfect square on the left side:
(x + -2.833333334)(x + -2.833333334) = 6.027777782

Calculate the square root of the right side: 2.455153311

Break this problem into two subproblems by setting 
(x + -2.833333334) equal to 2.455153311 and -2.455153311.

Subproblem 1

x + -2.833333334 = 2.455153311 Simplifying x + -2.833333334 = 2.455153311 Reorder the terms: -2.833333334 + x = 2.455153311 Solving -2.833333334 + x = 2.455153311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + x = 2.455153311 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + x = 2.455153311 + 2.833333334 x = 2.455153311 + 2.833333334 Combine like terms: 2.455153311 + 2.833333334 = 5.288486645 x = 5.288486645 Simplifying x = 5.288486645

Subproblem 2

x + -2.833333334 = -2.455153311 Simplifying x + -2.833333334 = -2.455153311 Reorder the terms: -2.833333334 + x = -2.455153311 Solving -2.833333334 + x = -2.455153311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + x = -2.455153311 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + x = -2.455153311 + 2.833333334 x = -2.455153311 + 2.833333334 Combine like terms: -2.455153311 + 2.833333334 = 0.378180023 x = 0.378180023 Simplifying x = 0.378180023

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.288486645, 0.378180023}

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