(3z-5)(9-z)=0

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Solution for (3z-5)(9-z)=0 equation:


Simplifying
(3z + -5)(9 + -1z) = 0

Reorder the terms:
(-5 + 3z)(9 + -1z) = 0

Multiply (-5 + 3z) * (9 + -1z)
(-5(9 + -1z) + 3z * (9 + -1z)) = 0
((9 * -5 + -1z * -5) + 3z * (9 + -1z)) = 0
((-45 + 5z) + 3z * (9 + -1z)) = 0
(-45 + 5z + (9 * 3z + -1z * 3z)) = 0
(-45 + 5z + (27z + -3z2)) = 0

Combine like terms: 5z + 27z = 32z
(-45 + 32z + -3z2) = 0

Solving
-45 + 32z + -3z2 = 0

Solving for variable 'z'.

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

Subproblem 1

Set the factor '(-9 + z)' equal to zero and attempt to solve: Simplifying -9 + z = 0 Solving -9 + z = 0 Move all terms containing z to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + z = 0 + 9 Combine like terms: -9 + 9 = 0 0 + z = 0 + 9 z = 0 + 9 Combine like terms: 0 + 9 = 9 z = 9 Simplifying z = 9

Subproblem 2

Set the factor '(5 + -3z)' equal to zero and attempt to solve: Simplifying 5 + -3z = 0 Solving 5 + -3z = 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 + -3z = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3z = 0 + -5 -3z = 0 + -5 Combine like terms: 0 + -5 = -5 -3z = -5 Divide each side by '-3'. z = 1.666666667 Simplifying z = 1.666666667

Solution

z = {9, 1.666666667}

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