12x^2+4x+15=0

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Solution for 12x^2+4x+15=0 equation:


Simplifying
12x2 + 4x + 15 = 0

Reorder the terms:
15 + 4x + 12x2 = 0

Solving
15 + 4x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
1.25 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + 0.3333333333x + -1.25 + x2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + 0.3333333333x + x2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + 0.3333333333x + x2 = 0 + -1.25
0.3333333333x + x2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
0.3333333333x + x2 = -1.25

The x term is 0.3333333333x.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333x + 0.02777777779 + x2 = -1.25 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333x + x2 = -1.25 + 0.02777777779

Combine like terms: -1.25 + 0.02777777779 = -1.22222222221
0.02777777779 + 0.3333333333x + x2 = -1.22222222221

Factor a perfect square on the left side:
(x + 0.1666666667)(x + 0.1666666667) = -1.22222222221

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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