5x^2+18x+61=0

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Solution for 5x^2+18x+61=0 equation:


Simplifying
5x2 + 18x + 61 = 0

Reorder the terms:
61 + 18x + 5x2 = 0

Solving
61 + 18x + 5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
12.2 + 3.6x + x2 = 0

Move the constant term to the right:

Add '-12.2' to each side of the equation.
12.2 + 3.6x + -12.2 + x2 = 0 + -12.2

Reorder the terms:
12.2 + -12.2 + 3.6x + x2 = 0 + -12.2

Combine like terms: 12.2 + -12.2 = 0.0
0.0 + 3.6x + x2 = 0 + -12.2
3.6x + x2 = 0 + -12.2

Combine like terms: 0 + -12.2 = -12.2
3.6x + x2 = -12.2

The x term is 3.6x.  Take half its coefficient (1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
3.6x + 3.24 + x2 = -12.2 + 3.24

Reorder the terms:
3.24 + 3.6x + x2 = -12.2 + 3.24

Combine like terms: -12.2 + 3.24 = -8.96
3.24 + 3.6x + x2 = -8.96

Factor a perfect square on the left side:
(x + 1.8)(x + 1.8) = -8.96

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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