.5x^2+5x+18=0

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


Simplifying
0.5x2 + 5x + 18 = 0

Reorder the terms:
18 + 5x + 0.5x2 = 0

Solving
18 + 5x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
36 + 10x + x2 = 0

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + 10x + -36 + x2 = 0 + -36

Reorder the terms:
36 + -36 + 10x + x2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + 10x + x2 = 0 + -36
10x + x2 = 0 + -36

Combine like terms: 0 + -36 = -36
10x + x2 = -36

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = -36 + 25

Reorder the terms:
25 + 10x + x2 = -36 + 25

Combine like terms: -36 + 25 = -11
25 + 10x + x2 = -11

Factor a perfect square on the left side:
(x + 5)(x + 5) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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