x^2+18x+73=-9

Solution for x^2+18x+73=-9 equation:

Simplifying
x2 + 18x + 73 = -9

Reorder the terms:
73 + 18x + x2 = -9

Solving
73 + 18x + x2 = -9

Solving for variable 'x'.

Reorder the terms:
73 + 9 + 18x + x2 = -9 + 9

Combine like terms: 73 + 9 = 82
82 + 18x + x2 = -9 + 9

Combine like terms: -9 + 9 = 0
82 + 18x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-82' to each side of the equation.
82 + 18x + -82 + x2 = 0 + -82

Reorder the terms:
82 + -82 + 18x + x2 = 0 + -82

Combine like terms: 82 + -82 = 0
0 + 18x + x2 = 0 + -82
18x + x2 = 0 + -82

Combine like terms: 0 + -82 = -82
18x + x2 = -82

The x term is 18x.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18x + 81 + x2 = -82 + 81

Reorder the terms:
81 + 18x + x2 = -82 + 81

Combine like terms: -82 + 81 = -1
81 + 18x + x2 = -1

Factor a perfect square on the left side:
(x + 9)(x + 9) = -1

Can't calculate square root of the right side.

The solution to this equation could not be determined.