2x^2-12x=36+7x

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Solution for 2x^2-12x=36+7x equation:


Simplifying
2x2 + -12x = 36 + 7x

Reorder the terms:
-12x + 2x2 = 36 + 7x

Solving
-12x + 2x2 = 36 + 7x

Solving for variable 'x'.

Reorder the terms:
-36 + -12x + -7x + 2x2 = 36 + 7x + -36 + -7x

Combine like terms: -12x + -7x = -19x
-36 + -19x + 2x2 = 36 + 7x + -36 + -7x

Reorder the terms:
-36 + -19x + 2x2 = 36 + -36 + 7x + -7x

Combine like terms: 36 + -36 = 0
-36 + -19x + 2x2 = 0 + 7x + -7x
-36 + -19x + 2x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
-36 + -19x + 2x2 = 0

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

Divide each side by '2'.
-18 + -9.5x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -9.5x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + -9.5x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -9.5x + x2 = 0 + 18
-9.5x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
-9.5x + x2 = 18

The x term is -9.5x.  Take half its coefficient (-4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
-9.5x + 22.5625 + x2 = 18 + 22.5625

Reorder the terms:
22.5625 + -9.5x + x2 = 18 + 22.5625

Combine like terms: 18 + 22.5625 = 40.5625
22.5625 + -9.5x + x2 = 40.5625

Factor a perfect square on the left side:
(x + -4.75)(x + -4.75) = 40.5625

Calculate the square root of the right side: 6.368869601

Break this problem into two subproblems by setting 
(x + -4.75) equal to 6.368869601 and -6.368869601.

Subproblem 1

x + -4.75 = 6.368869601 Simplifying x + -4.75 = 6.368869601 Reorder the terms: -4.75 + x = 6.368869601 Solving -4.75 + x = 6.368869601 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = 6.368869601 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = 6.368869601 + 4.75 x = 6.368869601 + 4.75 Combine like terms: 6.368869601 + 4.75 = 11.118869601 x = 11.118869601 Simplifying x = 11.118869601

Subproblem 2

x + -4.75 = -6.368869601 Simplifying x + -4.75 = -6.368869601 Reorder the terms: -4.75 + x = -6.368869601 Solving -4.75 + x = -6.368869601 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = -6.368869601 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = -6.368869601 + 4.75 x = -6.368869601 + 4.75 Combine like terms: -6.368869601 + 4.75 = -1.618869601 x = -1.618869601 Simplifying x = -1.618869601

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.118869601, -1.618869601}

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