10x^2+3x+8=0

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Solution for 10x^2+3x+8=0 equation:


Simplifying
10x2 + 3x + 8 = 0

Reorder the terms:
8 + 3x + 10x2 = 0

Solving
8 + 3x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
0.8 + 0.3x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 0.3x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 0.3x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 0.3x + x2 = 0 + -0.8
0.3x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
0.3x + x2 = -0.8

The x term is 0.3x.  Take half its coefficient (0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
0.3x + 0.0225 + x2 = -0.8 + 0.0225

Reorder the terms:
0.0225 + 0.3x + x2 = -0.8 + 0.0225

Combine like terms: -0.8 + 0.0225 = -0.7775
0.0225 + 0.3x + x2 = -0.7775

Factor a perfect square on the left side:
(x + 0.15)(x + 0.15) = -0.7775

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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