(5z+9)(4+z)=0

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Solution for (5z+9)(4+z)=0 equation:


Simplifying
(5z + 9)(4 + z) = 0

Reorder the terms:
(9 + 5z)(4 + z) = 0

Multiply (9 + 5z) * (4 + z)
(9(4 + z) + 5z * (4 + z)) = 0
((4 * 9 + z * 9) + 5z * (4 + z)) = 0
((36 + 9z) + 5z * (4 + z)) = 0
(36 + 9z + (4 * 5z + z * 5z)) = 0
(36 + 9z + (20z + 5z2)) = 0

Combine like terms: 9z + 20z = 29z
(36 + 29z + 5z2) = 0

Solving
36 + 29z + 5z2 = 0

Solving for variable 'z'.

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

Subproblem 1

Set the factor '(4 + z)' equal to zero and attempt to solve: Simplifying 4 + z = 0 Solving 4 + z = 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 + z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + z = 0 + -4 z = 0 + -4 Combine like terms: 0 + -4 = -4 z = -4 Simplifying z = -4

Subproblem 2

Set the factor '(9 + 5z)' equal to zero and attempt to solve: Simplifying 9 + 5z = 0 Solving 9 + 5z = 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 + 5z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 5z = 0 + -9 5z = 0 + -9 Combine like terms: 0 + -9 = -9 5z = -9 Divide each side by '5'. z = -1.8 Simplifying z = -1.8

Solution

z = {-4, -1.8}

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