(9-z)(4z-1)=0

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Solution for (9-z)(4z-1)=0 equation:


Simplifying
(9 + -1z)(4z + -1) = 0

Reorder the terms:
(9 + -1z)(-1 + 4z) = 0

Multiply (9 + -1z) * (-1 + 4z)
(9(-1 + 4z) + -1z * (-1 + 4z)) = 0
((-1 * 9 + 4z * 9) + -1z * (-1 + 4z)) = 0
((-9 + 36z) + -1z * (-1 + 4z)) = 0
(-9 + 36z + (-1 * -1z + 4z * -1z)) = 0
(-9 + 36z + (1z + -4z2)) = 0

Combine like terms: 36z + 1z = 37z
(-9 + 37z + -4z2) = 0

Solving
-9 + 37z + -4z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-9 + z)(1 + -4z) = 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 '(1 + -4z)' equal to zero and attempt to solve: Simplifying 1 + -4z = 0 Solving 1 + -4z = 0 Move all terms containing z to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -4z = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4z = 0 + -1 -4z = 0 + -1 Combine like terms: 0 + -1 = -1 -4z = -1 Divide each side by '-4'. z = 0.25 Simplifying z = 0.25

Solution

z = {9, 0.25}

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