3x^2+2.2x+1.21=0

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Solution for 3x^2+2.2x+1.21=0 equation:


Simplifying
3x2 + 2.2x + 1.21 = 0

Reorder the terms:
1.21 + 2.2x + 3x2 = 0

Solving
1.21 + 2.2x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
0.4033333333 + 0.7333333333x + x2 = 0

Move the constant term to the right:

Add '-0.4033333333' to each side of the equation.
0.4033333333 + 0.7333333333x + -0.4033333333 + x2 = 0 + -0.4033333333

Reorder the terms:
0.4033333333 + -0.4033333333 + 0.7333333333x + x2 = 0 + -0.4033333333

Combine like terms: 0.4033333333 + -0.4033333333 = 0.0000000000
0.0000000000 + 0.7333333333x + x2 = 0 + -0.4033333333
0.7333333333x + x2 = 0 + -0.4033333333

Combine like terms: 0 + -0.4033333333 = -0.4033333333
0.7333333333x + x2 = -0.4033333333

The x term is 0.7333333333x.  Take half its coefficient (0.3666666667).
Square it (0.1344444445) and add it to both sides.

Add '0.1344444445' to each side of the equation.
0.7333333333x + 0.1344444445 + x2 = -0.4033333333 + 0.1344444445

Reorder the terms:
0.1344444445 + 0.7333333333x + x2 = -0.4033333333 + 0.1344444445

Combine like terms: -0.4033333333 + 0.1344444445 = -0.2688888888
0.1344444445 + 0.7333333333x + x2 = -0.2688888888

Factor a perfect square on the left side:
(x + 0.3666666667)(x + 0.3666666667) = -0.2688888888

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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