x^2+0.9x+0.81=0

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Solution for x^2+0.9x+0.81=0 equation: 


Simplifying
x2 + 0.9x + 0.81 = 0

Reorder the terms:
0.81 + 0.9x + x2 = 0

Solving
0.81 + 0.9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.81' to each side of the equation.
0.81 + 0.9x + -0.81 + x2 = 0 + -0.81

Reorder the terms:
0.81 + -0.81 + 0.9x + x2 = 0 + -0.81

Combine like terms: 0.81 + -0.81 = 0.00
0.00 + 0.9x + x2 = 0 + -0.81
0.9x + x2 = 0 + -0.81

Combine like terms: 0 + -0.81 = -0.81
0.9x + x2 = -0.81

The x term is 0.9x.  Take half its coefficient (0.45).
Square it (0.2025) and add it to both sides.

Add '0.2025' to each side of the equation.
0.9x + 0.2025 + x2 = -0.81 + 0.2025

Reorder the terms:
0.2025 + 0.9x + x2 = -0.81 + 0.2025

Combine like terms: -0.81 + 0.2025 = -0.6075
0.2025 + 0.9x + x2 = -0.6075

Factor a perfect square on the left side:
(x + 0.45)(x + 0.45) = -0.6075

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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