3x(2x-1)=2x+13

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Solution for 3x(2x-1)=2x+13 equation:


Simplifying
3x(2x + -1) = 2x + 13

Reorder the terms:
3x(-1 + 2x) = 2x + 13
(-1 * 3x + 2x * 3x) = 2x + 13
(-3x + 6x2) = 2x + 13

Reorder the terms:
-3x + 6x2 = 13 + 2x

Solving
-3x + 6x2 = 13 + 2x

Solving for variable 'x'.

Reorder the terms:
-13 + -3x + -2x + 6x2 = 13 + 2x + -13 + -2x

Combine like terms: -3x + -2x = -5x
-13 + -5x + 6x2 = 13 + 2x + -13 + -2x

Reorder the terms:
-13 + -5x + 6x2 = 13 + -13 + 2x + -2x

Combine like terms: 13 + -13 = 0
-13 + -5x + 6x2 = 0 + 2x + -2x
-13 + -5x + 6x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-13 + -5x + 6x2 = 0

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

Divide each side by '6'.
-2.166666667 + -0.8333333333x + x2 = 0

Move the constant term to the right:

Add '2.166666667' to each side of the equation.
-2.166666667 + -0.8333333333x + 2.166666667 + x2 = 0 + 2.166666667

Reorder the terms:
-2.166666667 + 2.166666667 + -0.8333333333x + x2 = 0 + 2.166666667

Combine like terms: -2.166666667 + 2.166666667 = 0.000000000
0.000000000 + -0.8333333333x + x2 = 0 + 2.166666667
-0.8333333333x + x2 = 0 + 2.166666667

Combine like terms: 0 + 2.166666667 = 2.166666667
-0.8333333333x + x2 = 2.166666667

The x term is -0.8333333333x.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x + 0.1736111111 + x2 = 2.166666667 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x + x2 = 2.166666667 + 0.1736111111

Combine like terms: 2.166666667 + 0.1736111111 = 2.3402777781
0.1736111111 + -0.8333333333x + x2 = 2.3402777781

Factor a perfect square on the left side:
(x + -0.4166666667)(x + -0.4166666667) = 2.3402777781

Calculate the square root of the right side: 1.529796646

Break this problem into two subproblems by setting 
(x + -0.4166666667) equal to 1.529796646 and -1.529796646.

Subproblem 1

x + -0.4166666667 = 1.529796646 Simplifying x + -0.4166666667 = 1.529796646 Reorder the terms: -0.4166666667 + x = 1.529796646 Solving -0.4166666667 + x = 1.529796646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = 1.529796646 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = 1.529796646 + 0.4166666667 x = 1.529796646 + 0.4166666667 Combine like terms: 1.529796646 + 0.4166666667 = 1.9464633127 x = 1.9464633127 Simplifying x = 1.9464633127

Subproblem 2

x + -0.4166666667 = -1.529796646 Simplifying x + -0.4166666667 = -1.529796646 Reorder the terms: -0.4166666667 + x = -1.529796646 Solving -0.4166666667 + x = -1.529796646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = -1.529796646 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = -1.529796646 + 0.4166666667 x = -1.529796646 + 0.4166666667 Combine like terms: -1.529796646 + 0.4166666667 = -1.1131299793 x = -1.1131299793 Simplifying x = -1.1131299793

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9464633127, -1.1131299793}

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