4x^2+3x+138=0

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Solution for 4x^2+3x+138=0 equation:


Simplifying
4x2 + 3x + 138 = 0

Reorder the terms:
138 + 3x + 4x2 = 0

Solving
138 + 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'.
34.5 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-34.5' to each side of the equation.
34.5 + 0.75x + -34.5 + x2 = 0 + -34.5

Reorder the terms:
34.5 + -34.5 + 0.75x + x2 = 0 + -34.5

Combine like terms: 34.5 + -34.5 = 0.0
0.0 + 0.75x + x2 = 0 + -34.5
0.75x + x2 = 0 + -34.5

Combine like terms: 0 + -34.5 = -34.5
0.75x + x2 = -34.5

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 = -34.5 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -34.5 + 0.140625

Combine like terms: -34.5 + 0.140625 = -34.359375
0.140625 + 0.75x + x2 = -34.359375

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = -34.359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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