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

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


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

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

Multiply (-9 + 4z) * (4 + z)
(-9(4 + z) + 4z * (4 + z)) = 0
((4 * -9 + z * -9) + 4z * (4 + z)) = 0
((-36 + -9z) + 4z * (4 + z)) = 0
(-36 + -9z + (4 * 4z + z * 4z)) = 0
(-36 + -9z + (16z + 4z2)) = 0

Combine like terms: -9z + 16z = 7z
(-36 + 7z + 4z2) = 0

Solving
-36 + 7z + 4z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-4 + -1z)(9 + -4z) = 0

Subproblem 1

Set the factor '(-4 + -1z)' equal to zero and attempt to solve: Simplifying -4 + -1z = 0 Solving -4 + -1z = 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 + -1z = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1z = 0 + 4 -1z = 0 + 4 Combine like terms: 0 + 4 = 4 -1z = 4 Divide each side by '-1'. z = -4 Simplifying z = -4

Subproblem 2

Set the factor '(9 + -4z)' equal to zero and attempt to solve: Simplifying 9 + -4z = 0 Solving 9 + -4z = 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 + -4z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -4z = 0 + -9 -4z = 0 + -9 Combine like terms: 0 + -9 = -9 -4z = -9 Divide each side by '-4'. z = 2.25 Simplifying z = 2.25

Solution

z = {-4, 2.25}

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