-6z^2+9z+9=0

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Solution for -6z^2+9z+9=0 equation:


Simplifying
-6z2 + 9z + 9 = 0

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

Solving
9 + 9z + -6z2 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '3'.
3(3 + 3z + -2z2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(3 + 3z + -2z2)' equal to zero and attempt to solve: Simplifying 3 + 3z + -2z2 = 0 Solving 3 + 3z + -2z2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -1.5 + -1.5z + z2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + -1.5z + 1.5 + z2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + -1.5z + z2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + -1.5z + z2 = 0 + 1.5 -1.5z + z2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 -1.5z + z2 = 1.5 The z term is -1.5z. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5z + 0.5625 + z2 = 1.5 + 0.5625 Reorder the terms: 0.5625 + -1.5z + z2 = 1.5 + 0.5625 Combine like terms: 1.5 + 0.5625 = 2.0625 0.5625 + -1.5z + z2 = 2.0625 Factor a perfect square on the left side: (z + -0.75)(z + -0.75) = 2.0625 Calculate the square root of the right side: 1.436140662 Break this problem into two subproblems by setting (z + -0.75) equal to 1.436140662 and -1.436140662.

Subproblem 1

z + -0.75 = 1.436140662 Simplifying z + -0.75 = 1.436140662 Reorder the terms: -0.75 + z = 1.436140662 Solving -0.75 + z = 1.436140662 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + z = 1.436140662 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + z = 1.436140662 + 0.75 z = 1.436140662 + 0.75 Combine like terms: 1.436140662 + 0.75 = 2.186140662 z = 2.186140662 Simplifying z = 2.186140662

Subproblem 2

z + -0.75 = -1.436140662 Simplifying z + -0.75 = -1.436140662 Reorder the terms: -0.75 + z = -1.436140662 Solving -0.75 + z = -1.436140662 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + z = -1.436140662 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + z = -1.436140662 + 0.75 z = -1.436140662 + 0.75 Combine like terms: -1.436140662 + 0.75 = -0.686140662 z = -0.686140662 Simplifying z = -0.686140662

Solution

The solution to the problem is based on the solutions from the subproblems. z = {2.186140662, -0.686140662}

Solution

z = {2.186140662, -0.686140662}

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