15x^2+12x+5=0

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Solution for 15x^2+12x+5=0 equation:


Simplifying
15x2 + 12x + 5 = 0

Reorder the terms:
5 + 12x + 15x2 = 0

Solving
5 + 12x + 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'.
0.3333333333 + 0.8x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 0.8x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 0.8x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 0.8x + x2 = 0 + -0.3333333333
0.8x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
0.8x + x2 = -0.3333333333

The x term is 0.8x.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8x + 0.16 + x2 = -0.3333333333 + 0.16

Reorder the terms:
0.16 + 0.8x + x2 = -0.3333333333 + 0.16

Combine like terms: -0.3333333333 + 0.16 = -0.1733333333
0.16 + 0.8x + x2 = -0.1733333333

Factor a perfect square on the left side:
(x + 0.4)(x + 0.4) = -0.1733333333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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