x^2-2x=-99

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Solution for x^2-2x=-99 equation:


Simplifying
x2 + -2x = -99

Reorder the terms:
-2x + x2 = -99

Solving
-2x + x2 = -99

Solving for variable 'x'.

Reorder the terms:
99 + -2x + x2 = -99 + 99

Combine like terms: -99 + 99 = 0
99 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-99' to each side of the equation.
99 + -2x + -99 + x2 = 0 + -99

Reorder the terms:
99 + -99 + -2x + x2 = 0 + -99

Combine like terms: 99 + -99 = 0
0 + -2x + x2 = 0 + -99
-2x + x2 = 0 + -99

Combine like terms: 0 + -99 = -99
-2x + x2 = -99

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 = -99 + 1

Reorder the terms:
1 + -2x + x2 = -99 + 1

Combine like terms: -99 + 1 = -98
1 + -2x + x2 = -98

Factor a perfect square on the left side:
(x + -1)(x + -1) = -98

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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