25x^2+8x+80=0

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Solution for 25x^2+8x+80=0 equation:


Simplifying
25x2 + 8x + 80 = 0

Reorder the terms:
80 + 8x + 25x2 = 0

Solving
80 + 8x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
3.2 + 0.32x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + 0.32x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + 0.32x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + 0.32x + x2 = 0 + -3.2
0.32x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
0.32x + x2 = -3.2

The x term is 0.32x.  Take half its coefficient (0.16).
Square it (0.0256) and add it to both sides.

Add '0.0256' to each side of the equation.
0.32x + 0.0256 + x2 = -3.2 + 0.0256

Reorder the terms:
0.0256 + 0.32x + x2 = -3.2 + 0.0256

Combine like terms: -3.2 + 0.0256 = -3.1744
0.0256 + 0.32x + x2 = -3.1744

Factor a perfect square on the left side:
(x + 0.16)(x + 0.16) = -3.1744

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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