18z^2+9z-20=0

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Solution for 18z^2+9z-20=0 equation:


Simplifying
18z2 + 9z + -20 = 0

Reorder the terms:
-20 + 9z + 18z2 = 0

Solving
-20 + 9z + 18z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-4 + -3z)(5 + -6z) = 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 '(5 + -6z)' equal to zero and attempt to solve: Simplifying 5 + -6z = 0 Solving 5 + -6z = 0 Move all terms containing z to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -6z = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -6z = 0 + -5 -6z = 0 + -5 Combine like terms: 0 + -5 = -5 -6z = -5 Divide each side by '-6'. z = 0.8333333333 Simplifying z = 0.8333333333

Solution

z = {-1.333333333, 0.8333333333}

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