8x^2+3x+18=0

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Solution for 8x^2+3x+18=0 equation:


Simplifying
8x2 + 3x + 18 = 0

Reorder the terms:
18 + 3x + 8x2 = 0

Solving
18 + 3x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
2.25 + 0.375x + x2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 0.375x + -2.25 + x2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 0.375x + x2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 0.375x + x2 = 0 + -2.25
0.375x + x2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
0.375x + x2 = -2.25

The x term is 0.375x.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375x + 0.03515625 + x2 = -2.25 + 0.03515625

Reorder the terms:
0.03515625 + 0.375x + x2 = -2.25 + 0.03515625

Combine like terms: -2.25 + 0.03515625 = -2.21484375
0.03515625 + 0.375x + x2 = -2.21484375

Factor a perfect square on the left side:
(x + 0.1875)(x + 0.1875) = -2.21484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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