2z(3z+4)+9=0

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Solution for 2z(3z+4)+9=0 equation:


Simplifying
2z(3z + 4) + 9 = 0

Reorder the terms:
2z(4 + 3z) + 9 = 0
(4 * 2z + 3z * 2z) + 9 = 0
(8z + 6z2) + 9 = 0

Reorder the terms:
9 + 8z + 6z2 = 0

Solving
9 + 8z + 6z2 = 0

Solving for variable 'z'.

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

Divide each side by '6'.
1.5 + 1.333333333z + z2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 1.333333333z + -1.5 + z2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 1.333333333z + z2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 1.333333333z + z2 = 0 + -1.5
1.333333333z + z2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
1.333333333z + z2 = -1.5

The z term is 1.333333333z.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333z + 0.4444444442 + z2 = -1.5 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333z + z2 = -1.5 + 0.4444444442

Combine like terms: -1.5 + 0.4444444442 = -1.0555555558
0.4444444442 + 1.333333333z + z2 = -1.0555555558

Factor a perfect square on the left side:
(z + 0.6666666665)(z + 0.6666666665) = -1.0555555558

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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