18x^2+2=-9x

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


Simplifying
18x2 + 2 = -9x

Reorder the terms:
2 + 18x2 = -9x

Solving
2 + 18x2 = -9x

Solving for variable 'x'.

Reorder the terms:
2 + 9x + 18x2 = -9x + 9x

Combine like terms: -9x + 9x = 0
2 + 9x + 18x2 = 0

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

Divide each side by '18'.
0.1111111111 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + 0.5x + -0.1111111111 + x2 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + 0.5x + x2 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + 0.5x + x2 = 0 + -0.1111111111
0.5x + x2 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
0.5x + x2 = -0.1111111111

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = -0.1111111111 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = -0.1111111111 + 0.0625

Combine like terms: -0.1111111111 + 0.0625 = -0.0486111111
0.0625 + 0.5x + x2 = -0.0486111111

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = -0.0486111111

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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