2x^2+104=51x

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Solution for 2x^2+104=51x equation:


Simplifying
2x2 + 104 = 51x

Reorder the terms:
104 + 2x2 = 51x

Solving
104 + 2x2 = 51x

Solving for variable 'x'.

Reorder the terms:
104 + -51x + 2x2 = 51x + -51x

Combine like terms: 51x + -51x = 0
104 + -51x + 2x2 = 0

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

Divide each side by '2'.
52 + -25.5x + x2 = 0

Move the constant term to the right:

Add '-52' to each side of the equation.
52 + -25.5x + -52 + x2 = 0 + -52

Reorder the terms:
52 + -52 + -25.5x + x2 = 0 + -52

Combine like terms: 52 + -52 = 0
0 + -25.5x + x2 = 0 + -52
-25.5x + x2 = 0 + -52

Combine like terms: 0 + -52 = -52
-25.5x + x2 = -52

The x term is -25.5x.  Take half its coefficient (-12.75).
Square it (162.5625) and add it to both sides.

Add '162.5625' to each side of the equation.
-25.5x + 162.5625 + x2 = -52 + 162.5625

Reorder the terms:
162.5625 + -25.5x + x2 = -52 + 162.5625

Combine like terms: -52 + 162.5625 = 110.5625
162.5625 + -25.5x + x2 = 110.5625

Factor a perfect square on the left side:
(x + -12.75)(x + -12.75) = 110.5625

Calculate the square root of the right side: 10.514870422

Break this problem into two subproblems by setting 
(x + -12.75) equal to 10.514870422 and -10.514870422.

Subproblem 1

x + -12.75 = 10.514870422 Simplifying x + -12.75 = 10.514870422 Reorder the terms: -12.75 + x = 10.514870422 Solving -12.75 + x = 10.514870422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.75' to each side of the equation. -12.75 + 12.75 + x = 10.514870422 + 12.75 Combine like terms: -12.75 + 12.75 = 0.00 0.00 + x = 10.514870422 + 12.75 x = 10.514870422 + 12.75 Combine like terms: 10.514870422 + 12.75 = 23.264870422 x = 23.264870422 Simplifying x = 23.264870422

Subproblem 2

x + -12.75 = -10.514870422 Simplifying x + -12.75 = -10.514870422 Reorder the terms: -12.75 + x = -10.514870422 Solving -12.75 + x = -10.514870422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.75' to each side of the equation. -12.75 + 12.75 + x = -10.514870422 + 12.75 Combine like terms: -12.75 + 12.75 = 0.00 0.00 + x = -10.514870422 + 12.75 x = -10.514870422 + 12.75 Combine like terms: -10.514870422 + 12.75 = 2.235129578 x = 2.235129578 Simplifying x = 2.235129578

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.264870422, 2.235129578}

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