15x^2+8x+12=0

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Solution for 15x^2+8x+12=0 equation:


Simplifying
15x2 + 8x + 12 = 0

Reorder the terms:
12 + 8x + 15x2 = 0

Solving
12 + 8x + 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'.
0.8 + 0.5333333333x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 0.5333333333x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 0.5333333333x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 0.5333333333x + x2 = 0 + -0.8
0.5333333333x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
0.5333333333x + x2 = -0.8

The x term is 0.5333333333x.  Take half its coefficient (0.2666666667).
Square it (0.07111111113) and add it to both sides.

Add '0.07111111113' to each side of the equation.
0.5333333333x + 0.07111111113 + x2 = -0.8 + 0.07111111113

Reorder the terms:
0.07111111113 + 0.5333333333x + x2 = -0.8 + 0.07111111113

Combine like terms: -0.8 + 0.07111111113 = -0.72888888887
0.07111111113 + 0.5333333333x + x2 = -0.72888888887

Factor a perfect square on the left side:
(x + 0.2666666667)(x + 0.2666666667) = -0.72888888887

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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