-4.9x^2-3.5x-1=0

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Solution for -4.9x^2-3.5x-1=0 equation: 


Simplifying
-4.9x2 + -3.5x + -1 = 0

Reorder the terms:
-1 + -3.5x + -4.9x2 = 0

Solving
-1 + -3.5x + -4.9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
0.2040816327 + 0.7142857143x + x2 = 0

Move the constant term to the right:

Add '-0.2040816327' to each side of the equation.
0.2040816327 + 0.7142857143x + -0.2040816327 + x2 = 0 + -0.2040816327

Reorder the terms:
0.2040816327 + -0.2040816327 + 0.7142857143x + x2 = 0 + -0.2040816327

Combine like terms: 0.2040816327 + -0.2040816327 = 0.0000000000
0.0000000000 + 0.7142857143x + x2 = 0 + -0.2040816327
0.7142857143x + x2 = 0 + -0.2040816327

Combine like terms: 0 + -0.2040816327 = -0.2040816327
0.7142857143x + x2 = -0.2040816327

The x term is 0.7142857143x.  Take half its coefficient (0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
0.7142857143x + 0.1275510204 + x2 = -0.2040816327 + 0.1275510204

Reorder the terms:
0.1275510204 + 0.7142857143x + x2 = -0.2040816327 + 0.1275510204

Combine like terms: -0.2040816327 + 0.1275510204 = -0.0765306123
0.1275510204 + 0.7142857143x + x2 = -0.0765306123

Factor a perfect square on the left side:
(x + 0.3571428572)(x + 0.3571428572) = -0.0765306123

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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