9z^2+18z+8=0

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Solution for 9z^2+18z+8=0 equation:


Simplifying
9z2 + 18z + 8 = 0

Reorder the terms:
8 + 18z + 9z2 = 0

Solving
8 + 18z + 9z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(4 + 3z)(2 + 3z) = 0

Subproblem 1

Set the factor '(4 + 3z)' equal to zero and attempt to solve: Simplifying 4 + 3z = 0 Solving 4 + 3z = 0 Move all terms containing z to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3z = 0 + -4 3z = 0 + -4 Combine like terms: 0 + -4 = -4 3z = -4 Divide each side by '3'. z = -1.333333333 Simplifying z = -1.333333333

Subproblem 2

Set the factor '(2 + 3z)' equal to zero and attempt to solve: Simplifying 2 + 3z = 0 Solving 2 + 3z = 0 Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3z = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3z = 0 + -2 3z = 0 + -2 Combine like terms: 0 + -2 = -2 3z = -2 Divide each side by '3'. z = -0.6666666667 Simplifying z = -0.6666666667

Solution

z = {-1.333333333, -0.6666666667}

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