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Simplifying (5 + z)(5z + 4) = 0 Reorder the terms: (5 + z)(4 + 5z) = 0 Multiply (5 + z) * (4 + 5z) (5(4 + 5z) + z(4 + 5z)) = 0 ((4 * 5 + 5z * 5) + z(4 + 5z)) = 0 ((20 + 25z) + z(4 + 5z)) = 0 (20 + 25z + (4 * z + 5z * z)) = 0 (20 + 25z + (4z + 5z2)) = 0 Combine like terms: 25z + 4z = 29z (20 + 29z + 5z2) = 0 Solving 20 + 29z + 5z2 = 0 Solving for variable 'z'. Factor a trinomial. (5 + z)(4 + 5z) = 0Subproblem 1
Set the factor '(5 + z)' equal to zero and attempt to solve: Simplifying 5 + z = 0 Solving 5 + z = 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 + z = 0 + -5 Combine like terms: 5 + -5 = 0 0 + z = 0 + -5 z = 0 + -5 Combine like terms: 0 + -5 = -5 z = -5 Simplifying z = -5Subproblem 2
Set the factor '(4 + 5z)' equal to zero and attempt to solve: Simplifying 4 + 5z = 0 Solving 4 + 5z = 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 + 5z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5z = 0 + -4 5z = 0 + -4 Combine like terms: 0 + -4 = -4 5z = -4 Divide each side by '5'. z = -0.8 Simplifying z = -0.8Solution
z = {-5, -0.8}
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