4x+25+9x+9=13x^2-4x+12

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Solution for 4x+25+9x+9=13x^2-4x+12 equation:


Simplifying
4x + 25 + 9x + 9 = 13x2 + -4x + 12

Reorder the terms:
25 + 9 + 4x + 9x = 13x2 + -4x + 12

Combine like terms: 25 + 9 = 34
34 + 4x + 9x = 13x2 + -4x + 12

Combine like terms: 4x + 9x = 13x
34 + 13x = 13x2 + -4x + 12

Reorder the terms:
34 + 13x = 12 + -4x + 13x2

Solving
34 + 13x = 12 + -4x + 13x2

Solving for variable 'x'.

Reorder the terms:
34 + -12 + 13x + 4x + -13x2 = 12 + -4x + 13x2 + -12 + 4x + -13x2

Combine like terms: 34 + -12 = 22
22 + 13x + 4x + -13x2 = 12 + -4x + 13x2 + -12 + 4x + -13x2

Combine like terms: 13x + 4x = 17x
22 + 17x + -13x2 = 12 + -4x + 13x2 + -12 + 4x + -13x2

Reorder the terms:
22 + 17x + -13x2 = 12 + -12 + -4x + 4x + 13x2 + -13x2

Combine like terms: 12 + -12 = 0
22 + 17x + -13x2 = 0 + -4x + 4x + 13x2 + -13x2
22 + 17x + -13x2 = -4x + 4x + 13x2 + -13x2

Combine like terms: -4x + 4x = 0
22 + 17x + -13x2 = 0 + 13x2 + -13x2
22 + 17x + -13x2 = 13x2 + -13x2

Combine like terms: 13x2 + -13x2 = 0
22 + 17x + -13x2 = 0

Begin completing the square.  Divide all terms by
-13 the coefficient of the squared term: 

Divide each side by '-13'.
-1.692307692 + -1.307692308x + x2 = 0

Move the constant term to the right:

Add '1.692307692' to each side of the equation.
-1.692307692 + -1.307692308x + 1.692307692 + x2 = 0 + 1.692307692

Reorder the terms:
-1.692307692 + 1.692307692 + -1.307692308x + x2 = 0 + 1.692307692

Combine like terms: -1.692307692 + 1.692307692 = 0.000000000
0.000000000 + -1.307692308x + x2 = 0 + 1.692307692
-1.307692308x + x2 = 0 + 1.692307692

Combine like terms: 0 + 1.692307692 = 1.692307692
-1.307692308x + x2 = 1.692307692

The x term is -1.307692308x.  Take half its coefficient (-0.653846154).
Square it (0.4275147931) and add it to both sides.

Add '0.4275147931' to each side of the equation.
-1.307692308x + 0.4275147931 + x2 = 1.692307692 + 0.4275147931

Reorder the terms:
0.4275147931 + -1.307692308x + x2 = 1.692307692 + 0.4275147931

Combine like terms: 1.692307692 + 0.4275147931 = 2.1198224851
0.4275147931 + -1.307692308x + x2 = 2.1198224851

Factor a perfect square on the left side:
(x + -0.653846154)(x + -0.653846154) = 2.1198224851

Calculate the square root of the right side: 1.455961018

Break this problem into two subproblems by setting 
(x + -0.653846154) equal to 1.455961018 and -1.455961018.

Subproblem 1

x + -0.653846154 = 1.455961018 Simplifying x + -0.653846154 = 1.455961018 Reorder the terms: -0.653846154 + x = 1.455961018 Solving -0.653846154 + x = 1.455961018 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.653846154' to each side of the equation. -0.653846154 + 0.653846154 + x = 1.455961018 + 0.653846154 Combine like terms: -0.653846154 + 0.653846154 = 0.000000000 0.000000000 + x = 1.455961018 + 0.653846154 x = 1.455961018 + 0.653846154 Combine like terms: 1.455961018 + 0.653846154 = 2.109807172 x = 2.109807172 Simplifying x = 2.109807172

Subproblem 2

x + -0.653846154 = -1.455961018 Simplifying x + -0.653846154 = -1.455961018 Reorder the terms: -0.653846154 + x = -1.455961018 Solving -0.653846154 + x = -1.455961018 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.653846154' to each side of the equation. -0.653846154 + 0.653846154 + x = -1.455961018 + 0.653846154 Combine like terms: -0.653846154 + 0.653846154 = 0.000000000 0.000000000 + x = -1.455961018 + 0.653846154 x = -1.455961018 + 0.653846154 Combine like terms: -1.455961018 + 0.653846154 = -0.802114864 x = -0.802114864 Simplifying x = -0.802114864

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.109807172, -0.802114864}

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