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Simplifying (8 + -1z)(2z + 9) = 0 Reorder the terms: (8 + -1z)(9 + 2z) = 0 Multiply (8 + -1z) * (9 + 2z) (8(9 + 2z) + -1z * (9 + 2z)) = 0 ((9 * 8 + 2z * 8) + -1z * (9 + 2z)) = 0 ((72 + 16z) + -1z * (9 + 2z)) = 0 (72 + 16z + (9 * -1z + 2z * -1z)) = 0 (72 + 16z + (-9z + -2z2)) = 0 Combine like terms: 16z + -9z = 7z (72 + 7z + -2z2) = 0 Solving 72 + 7z + -2z2 = 0 Solving for variable 'z'. Factor a trinomial. (8 + -1z)(9 + 2z) = 0Subproblem 1
Set the factor '(8 + -1z)' equal to zero and attempt to solve: Simplifying 8 + -1z = 0 Solving 8 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1z = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1z = 0 + -8 -1z = 0 + -8 Combine like terms: 0 + -8 = -8 -1z = -8 Divide each side by '-1'. z = 8 Simplifying z = 8Subproblem 2
Set the factor '(9 + 2z)' equal to zero and attempt to solve: Simplifying 9 + 2z = 0 Solving 9 + 2z = 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 + 2z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2z = 0 + -9 2z = 0 + -9 Combine like terms: 0 + -9 = -9 2z = -9 Divide each side by '2'. z = -4.5 Simplifying z = -4.5Solution
z = {8, -4.5}
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