2x^2+x+20=0

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Solution for 2x^2+x+20=0 equation:


Simplifying
2x2 + x + 20 = 0

Reorder the terms:
20 + x + 2x2 = 0

Solving
20 + x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
10 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + 0.5x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + 0.5x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 0.5x + x2 = 0 + -10
0.5x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
0.5x + x2 = -10

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

Add '0.25' to each side of the equation.
0.5x + 0.25 + x2 = -10 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = -10 + 0.25

Combine like terms: -10 + 0.25 = -9.75
0.25 + 0.5x + x2 = -9.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -9.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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