9z^2+18z-135=

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Solution for 9z^2+18z-135= equation:


Simplifying
9z2 + 18z + -135 = 0

Reorder the terms:
-135 + 18z + 9z2 = 0

Solving
-135 + 18z + 9z2 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '9'.
9(-15 + 2z + z2) = 0

Factor a trinomial.
9((-5 + -1z)(3 + -1z)) = 0

Ignore the factor 9.

Subproblem 1

Set the factor '(-5 + -1z)' equal to zero and attempt to solve: Simplifying -5 + -1z = 0 Solving -5 + -1z = 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 + -1z = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1z = 0 + 5 -1z = 0 + 5 Combine like terms: 0 + 5 = 5 -1z = 5 Divide each side by '-1'. z = -5 Simplifying z = -5

Subproblem 2

Set the factor '(3 + -1z)' equal to zero and attempt to solve: Simplifying 3 + -1z = 0 Solving 3 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1z = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1z = 0 + -3 -1z = 0 + -3 Combine like terms: 0 + -3 = -3 -1z = -3 Divide each side by '-1'. z = 3 Simplifying z = 3

Solution

z = {-5, 3}

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