15x^2+18x+11=0

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Solution for 15x^2+18x+11=0 equation:


Simplifying
15x2 + 18x + 11 = 0

Reorder the terms:
11 + 18x + 15x2 = 0

Solving
11 + 18x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
0.7333333333 + 1.2x + x2 = 0

Move the constant term to the right:

Add '-0.7333333333' to each side of the equation.
0.7333333333 + 1.2x + -0.7333333333 + x2 = 0 + -0.7333333333

Reorder the terms:
0.7333333333 + -0.7333333333 + 1.2x + x2 = 0 + -0.7333333333

Combine like terms: 0.7333333333 + -0.7333333333 = 0.0000000000
0.0000000000 + 1.2x + x2 = 0 + -0.7333333333
1.2x + x2 = 0 + -0.7333333333

Combine like terms: 0 + -0.7333333333 = -0.7333333333
1.2x + x2 = -0.7333333333

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = -0.7333333333 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = -0.7333333333 + 0.36

Combine like terms: -0.7333333333 + 0.36 = -0.3733333333
0.36 + 1.2x + x2 = -0.3733333333

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = -0.3733333333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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