20x^2+5x+8=0

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Solution for 20x^2+5x+8=0 equation:


Simplifying
20x2 + 5x + 8 = 0

Reorder the terms:
8 + 5x + 20x2 = 0

Solving
8 + 5x + 20x2 = 0

Solving for variable 'x'.

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

Divide each side by '20'.
0.4 + 0.25x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + 0.25x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + 0.25x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 0.25x + x2 = 0 + -0.4
0.25x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
0.25x + x2 = -0.4

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = -0.4 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = -0.4 + 0.015625

Combine like terms: -0.4 + 0.015625 = -0.384375
0.015625 + 0.25x + x2 = -0.384375

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = -0.384375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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