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Simplifying (2z + 9)(z + 7) = 0 Reorder the terms: (9 + 2z)(z + 7) = 0 Reorder the terms: (9 + 2z)(7 + z) = 0 Multiply (9 + 2z) * (7 + z) (9(7 + z) + 2z * (7 + z)) = 0 ((7 * 9 + z * 9) + 2z * (7 + z)) = 0 ((63 + 9z) + 2z * (7 + z)) = 0 (63 + 9z + (7 * 2z + z * 2z)) = 0 (63 + 9z + (14z + 2z2)) = 0 Combine like terms: 9z + 14z = 23z (63 + 23z + 2z2) = 0 Solving 63 + 23z + 2z2 = 0 Solving for variable 'z'. Factor a trinomial. (7 + z)(9 + 2z) = 0Subproblem 1
Set the factor '(7 + z)' equal to zero and attempt to solve: Simplifying 7 + z = 0 Solving 7 + z = 0 Move all terms containing z to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + z = 0 + -7 Combine like terms: 7 + -7 = 0 0 + z = 0 + -7 z = 0 + -7 Combine like terms: 0 + -7 = -7 z = -7 Simplifying z = -7Subproblem 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 = {-7, -4.5}
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