4x^2+3x+80=0

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Solution for 4x^2+3x+80=0 equation:


Simplifying
4x2 + 3x + 80 = 0

Reorder the terms:
80 + 3x + 4x2 = 0

Solving
80 + 3x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
20 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + 0.75x + -20 + x2 = 0 + -20

Reorder the terms:
20 + -20 + 0.75x + x2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 0.75x + x2 = 0 + -20
0.75x + x2 = 0 + -20

Combine like terms: 0 + -20 = -20
0.75x + x2 = -20

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = -20 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -20 + 0.140625

Combine like terms: -20 + 0.140625 = -19.859375
0.140625 + 0.75x + x2 = -19.859375

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = -19.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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