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Simplifying (5 + -1z)(5z + 9) = 0 Reorder the terms: (5 + -1z)(9 + 5z) = 0 Multiply (5 + -1z) * (9 + 5z) (5(9 + 5z) + -1z * (9 + 5z)) = 0 ((9 * 5 + 5z * 5) + -1z * (9 + 5z)) = 0 ((45 + 25z) + -1z * (9 + 5z)) = 0 (45 + 25z + (9 * -1z + 5z * -1z)) = 0 (45 + 25z + (-9z + -5z2)) = 0 Combine like terms: 25z + -9z = 16z (45 + 16z + -5z2) = 0 Solving 45 + 16z + -5z2 = 0 Solving for variable 'z'. Factor a trinomial. (5 + -1z)(9 + 5z) = 0Subproblem 1
Set the factor '(5 + -1z)' equal to zero and attempt to solve: Simplifying 5 + -1z = 0 Solving 5 + -1z = 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 + -1z = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1z = 0 + -5 -1z = 0 + -5 Combine like terms: 0 + -5 = -5 -1z = -5 Divide each side by '-1'. z = 5 Simplifying z = 5Subproblem 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 = -1.8Solution
z = {5, -1.8}
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