x^2-54=2x

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Solution for x^2-54=2x equation:


Simplifying
x2 + -54 = 2x

Reorder the terms:
-54 + x2 = 2x

Solving
-54 + x2 = 2x

Solving for variable 'x'.

Reorder the terms:
-54 + -2x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-54 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '54' to each side of the equation.
-54 + -2x + 54 + x2 = 0 + 54

Reorder the terms:
-54 + 54 + -2x + x2 = 0 + 54

Combine like terms: -54 + 54 = 0
0 + -2x + x2 = 0 + 54
-2x + x2 = 0 + 54

Combine like terms: 0 + 54 = 54
-2x + x2 = 54

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 54 + 1

Reorder the terms:
1 + -2x + x2 = 54 + 1

Combine like terms: 54 + 1 = 55
1 + -2x + x2 = 55

Factor a perfect square on the left side:
(x + -1)(x + -1) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(x + -1) equal to 7.416198487 and -7.416198487.

Subproblem 1

x + -1 = 7.416198487 Simplifying x + -1 = 7.416198487 Reorder the terms: -1 + x = 7.416198487 Solving -1 + x = 7.416198487 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 7.416198487 + 1 Combine like terms: -1 + 1 = 0 0 + x = 7.416198487 + 1 x = 7.416198487 + 1 Combine like terms: 7.416198487 + 1 = 8.416198487 x = 8.416198487 Simplifying x = 8.416198487

Subproblem 2

x + -1 = -7.416198487 Simplifying x + -1 = -7.416198487 Reorder the terms: -1 + x = -7.416198487 Solving -1 + x = -7.416198487 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -7.416198487 + 1 Combine like terms: -1 + 1 = 0 0 + x = -7.416198487 + 1 x = -7.416198487 + 1 Combine like terms: -7.416198487 + 1 = -6.416198487 x = -6.416198487 Simplifying x = -6.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.416198487, -6.416198487}

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