x^2-6x=-18

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Solution for x^2-6x=-18 equation:


Simplifying
x2 + -6x = -18

Reorder the terms:
-6x + x2 = -18

Solving
-6x + x2 = -18

Solving for variable 'x'.

Reorder the terms:
18 + -6x + x2 = -18 + 18

Combine like terms: -18 + 18 = 0
18 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -6x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + -6x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -6x + x2 = 0 + -18
-6x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
-6x + x2 = -18

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -18 + 9

Reorder the terms:
9 + -6x + x2 = -18 + 9

Combine like terms: -18 + 9 = -9
9 + -6x + x2 = -9

Factor a perfect square on the left side:
(x + -3)(x + -3) = -9

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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