x^2-2x-488=0

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Solution for x^2-2x-488=0 equation:


Simplifying
x2 + -2x + -488 = 0

Reorder the terms:
-488 + -2x + x2 = 0

Solving
-488 + -2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '488' to each side of the equation.
-488 + -2x + 488 + x2 = 0 + 488

Reorder the terms:
-488 + 488 + -2x + x2 = 0 + 488

Combine like terms: -488 + 488 = 0
0 + -2x + x2 = 0 + 488
-2x + x2 = 0 + 488

Combine like terms: 0 + 488 = 488
-2x + x2 = 488

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 = 488 + 1

Reorder the terms:
1 + -2x + x2 = 488 + 1

Combine like terms: 488 + 1 = 489
1 + -2x + x2 = 489

Factor a perfect square on the left side:
(x + -1)(x + -1) = 489

Calculate the square root of the right side: 22.113344387

Break this problem into two subproblems by setting 
(x + -1) equal to 22.113344387 and -22.113344387.

Subproblem 1

x + -1 = 22.113344387 Simplifying x + -1 = 22.113344387 Reorder the terms: -1 + x = 22.113344387 Solving -1 + x = 22.113344387 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 = 22.113344387 + 1 Combine like terms: -1 + 1 = 0 0 + x = 22.113344387 + 1 x = 22.113344387 + 1 Combine like terms: 22.113344387 + 1 = 23.113344387 x = 23.113344387 Simplifying x = 23.113344387

Subproblem 2

x + -1 = -22.113344387 Simplifying x + -1 = -22.113344387 Reorder the terms: -1 + x = -22.113344387 Solving -1 + x = -22.113344387 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 = -22.113344387 + 1 Combine like terms: -1 + 1 = 0 0 + x = -22.113344387 + 1 x = -22.113344387 + 1 Combine like terms: -22.113344387 + 1 = -21.113344387 x = -21.113344387 Simplifying x = -21.113344387

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.113344387, -21.113344387}

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