x^2-x=-9

Solution for x^2-x=-9 equation:

Simplifying
x2 + -1x = -9

Reorder the terms:
-1x + x2 = -9

Solving
-1x + x2 = -9

Solving for variable 'x'.

Reorder the terms:
9 + -1x + x2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -1x + -9 + x2 = 0 + -9

Reorder the terms:
9 + -9 + -1x + x2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1x + x2 = 0 + -9
-1x + x2 = 0 + -9

Combine like terms: 0 + -9 = -9
-1x + x2 = -9

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -9 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -9 + 0.25

Combine like terms: -9 + 0.25 = -8.75
0.25 + -1x + x2 = -8.75

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.