1.6x^2+2x+2.5=0

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Solution for 1.6x^2+2x+2.5=0 equation:


Simplifying
1.6x2 + 2x + 2.5 = 0

Reorder the terms:
2.5 + 2x + 1.6x2 = 0

Solving
2.5 + 2x + 1.6x2 = 0

Solving for variable 'x'.

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

Divide each side by '1.6'.
1.5625 + 1.25x + x2 = 0

Move the constant term to the right:

Add '-1.5625' to each side of the equation.
1.5625 + 1.25x + -1.5625 + x2 = 0 + -1.5625

Reorder the terms:
1.5625 + -1.5625 + 1.25x + x2 = 0 + -1.5625

Combine like terms: 1.5625 + -1.5625 = 0.0000
0.0000 + 1.25x + x2 = 0 + -1.5625
1.25x + x2 = 0 + -1.5625

Combine like terms: 0 + -1.5625 = -1.5625
1.25x + x2 = -1.5625

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 = -1.5625 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = -1.5625 + 0.390625

Combine like terms: -1.5625 + 0.390625 = -1.171875
0.390625 + 1.25x + x2 = -1.171875

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = -1.171875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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