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

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


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

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

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

Combine like terms: -3z + 45z = 42z
(27 + 42z + -5z2) = 0

Solving
27 + 42z + -5z2 = 0

Solving for variable 'z'.

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

Subproblem 1

Set the factor '(9 + -1z)' equal to zero and attempt to solve: Simplifying 9 + -1z = 0 Solving 9 + -1z = 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 + -1z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1z = 0 + -9 -1z = 0 + -9 Combine like terms: 0 + -9 = -9 -1z = -9 Divide each side by '-1'. z = 9 Simplifying z = 9

Subproblem 2

Set the factor '(3 + 5z)' equal to zero and attempt to solve: Simplifying 3 + 5z = 0 Solving 3 + 5z = 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 + 5z = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 5z = 0 + -3 5z = 0 + -3 Combine like terms: 0 + -3 = -3 5z = -3 Divide each side by '5'. z = -0.6 Simplifying z = -0.6

Solution

z = {9, -0.6}

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