13x^2-5x=6-2x^2

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Solution for 13x^2-5x=6-2x^2 equation:


Simplifying
13x2 + -5x = 6 + -2x2

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

Solving
-5x + 13x2 = 6 + -2x2

Solving for variable 'x'.

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

Combine like terms: 13x2 + 2x2 = 15x2
-6 + -5x + 15x2 = 6 + -2x2 + -6 + 2x2

Reorder the terms:
-6 + -5x + 15x2 = 6 + -6 + -2x2 + 2x2

Combine like terms: 6 + -6 = 0
-6 + -5x + 15x2 = 0 + -2x2 + 2x2
-6 + -5x + 15x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-6 + -5x + 15x2 = 0

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

Divide each side by '15'.
-0.4 + -0.3333333333x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -0.3333333333x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -0.3333333333x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -0.3333333333x + x2 = 0 + 0.4
-0.3333333333x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-0.3333333333x + x2 = 0.4

The x term is -0.3333333333x.  Take half its coefficient (-0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
-0.3333333333x + 0.02777777779 + x2 = 0.4 + 0.02777777779

Reorder the terms:
0.02777777779 + -0.3333333333x + x2 = 0.4 + 0.02777777779

Combine like terms: 0.4 + 0.02777777779 = 0.42777777779
0.02777777779 + -0.3333333333x + x2 = 0.42777777779

Factor a perfect square on the left side:
(x + -0.1666666667)(x + -0.1666666667) = 0.42777777779

Calculate the square root of the right side: 0.654047229

Break this problem into two subproblems by setting 
(x + -0.1666666667) equal to 0.654047229 and -0.654047229.

Subproblem 1

x + -0.1666666667 = 0.654047229 Simplifying x + -0.1666666667 = 0.654047229 Reorder the terms: -0.1666666667 + x = 0.654047229 Solving -0.1666666667 + x = 0.654047229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = 0.654047229 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = 0.654047229 + 0.1666666667 x = 0.654047229 + 0.1666666667 Combine like terms: 0.654047229 + 0.1666666667 = 0.8207138957 x = 0.8207138957 Simplifying x = 0.8207138957

Subproblem 2

x + -0.1666666667 = -0.654047229 Simplifying x + -0.1666666667 = -0.654047229 Reorder the terms: -0.1666666667 + x = -0.654047229 Solving -0.1666666667 + x = -0.654047229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = -0.654047229 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = -0.654047229 + 0.1666666667 x = -0.654047229 + 0.1666666667 Combine like terms: -0.654047229 + 0.1666666667 = -0.4873805623 x = -0.4873805623 Simplifying x = -0.4873805623

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8207138957, -0.4873805623}

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