2x^2+5x+6.25=0

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Solution for 2x^2+5x+6.25=0 equation:


Simplifying
2x2 + 5x + 6.25 = 0

Reorder the terms:
6.25 + 5x + 2x2 = 0

Solving
6.25 + 5x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
3.125 + 2.5x + x2 = 0

Move the constant term to the right:

Add '-3.125' to each side of the equation.
3.125 + 2.5x + -3.125 + x2 = 0 + -3.125

Reorder the terms:
3.125 + -3.125 + 2.5x + x2 = 0 + -3.125

Combine like terms: 3.125 + -3.125 = 0.000
0.000 + 2.5x + x2 = 0 + -3.125
2.5x + x2 = 0 + -3.125

Combine like terms: 0 + -3.125 = -3.125
2.5x + x2 = -3.125

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = -3.125 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = -3.125 + 1.5625

Combine like terms: -3.125 + 1.5625 = -1.5625
1.5625 + 2.5x + x2 = -1.5625

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = -1.5625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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