3z^2+9z+8=0

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Solution for 3z^2+9z+8=0 equation:


Simplifying
3z2 + 9z + 8 = 0

Reorder the terms:
8 + 9z + 3z2 = 0

Solving
8 + 9z + 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'.
2.666666667 + 3z + z2 = 0

Move the constant term to the right:

Add '-2.666666667' to each side of the equation.
2.666666667 + 3z + -2.666666667 + z2 = 0 + -2.666666667

Reorder the terms:
2.666666667 + -2.666666667 + 3z + z2 = 0 + -2.666666667

Combine like terms: 2.666666667 + -2.666666667 = 0.000000000
0.000000000 + 3z + z2 = 0 + -2.666666667
3z + z2 = 0 + -2.666666667

Combine like terms: 0 + -2.666666667 = -2.666666667
3z + z2 = -2.666666667

The z term is 3z.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3z + 2.25 + z2 = -2.666666667 + 2.25

Reorder the terms:
2.25 + 3z + z2 = -2.666666667 + 2.25

Combine like terms: -2.666666667 + 2.25 = -0.416666667
2.25 + 3z + z2 = -0.416666667

Factor a perfect square on the left side:
(z + 1.5)(z + 1.5) = -0.416666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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