4x^2+5x+256=20

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Solution for 4x^2+5x+256=20 equation:


Simplifying
4x2 + 5x + 256 = 20

Reorder the terms:
256 + 5x + 4x2 = 20

Solving
256 + 5x + 4x2 = 20

Solving for variable 'x'.

Reorder the terms:
256 + -20 + 5x + 4x2 = 20 + -20

Combine like terms: 256 + -20 = 236
236 + 5x + 4x2 = 20 + -20

Combine like terms: 20 + -20 = 0
236 + 5x + 4x2 = 0

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

Divide each side by '4'.
59 + 1.25x + x2 = 0

Move the constant term to the right:

Add '-59' to each side of the equation.
59 + 1.25x + -59 + x2 = 0 + -59

Reorder the terms:
59 + -59 + 1.25x + x2 = 0 + -59

Combine like terms: 59 + -59 = 0
0 + 1.25x + x2 = 0 + -59
1.25x + x2 = 0 + -59

Combine like terms: 0 + -59 = -59
1.25x + x2 = -59

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = -59 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = -59 + 0.390625

Combine like terms: -59 + 0.390625 = -58.609375
0.390625 + 1.25x + x2 = -58.609375

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = -58.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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