3z^2+12z+13=0

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Solution for 3z^2+12z+13=0 equation:


Simplifying
3z2 + 12z + 13 = 0

Reorder the terms:
13 + 12z + 3z2 = 0

Solving
13 + 12z + 3z2 = 0

Solving for variable 'z'.

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

Divide each side by '3'.
4.333333333 + 4z + z2 = 0

Move the constant term to the right:

Add '-4.333333333' to each side of the equation.
4.333333333 + 4z + -4.333333333 + z2 = 0 + -4.333333333

Reorder the terms:
4.333333333 + -4.333333333 + 4z + z2 = 0 + -4.333333333

Combine like terms: 4.333333333 + -4.333333333 = 0.000000000
0.000000000 + 4z + z2 = 0 + -4.333333333
4z + z2 = 0 + -4.333333333

Combine like terms: 0 + -4.333333333 = -4.333333333
4z + z2 = -4.333333333

The z term is 4z.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4z + 4 + z2 = -4.333333333 + 4

Reorder the terms:
4 + 4z + z2 = -4.333333333 + 4

Combine like terms: -4.333333333 + 4 = -0.333333333
4 + 4z + z2 = -0.333333333

Factor a perfect square on the left side:
(z + 2)(z + 2) = -0.333333333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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