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Simplifying (9 + z)(4z + 2) = 0 Reorder the terms: (9 + z)(2 + 4z) = 0 Multiply (9 + z) * (2 + 4z) (9(2 + 4z) + z(2 + 4z)) = 0 ((2 * 9 + 4z * 9) + z(2 + 4z)) = 0 ((18 + 36z) + z(2 + 4z)) = 0 (18 + 36z + (2 * z + 4z * z)) = 0 (18 + 36z + (2z + 4z2)) = 0 Combine like terms: 36z + 2z = 38z (18 + 38z + 4z2) = 0 Solving 18 + 38z + 4z2 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '2'. 2(9 + 19z + 2z2) = 0 Factor a trinomial. 2((9 + z)(1 + 2z)) = 0 Ignore the factor 2.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 = -9Subproblem 2
Set the factor '(1 + 2z)' equal to zero and attempt to solve: Simplifying 1 + 2z = 0 Solving 1 + 2z = 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 + 2z = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2z = 0 + -1 2z = 0 + -1 Combine like terms: 0 + -1 = -1 2z = -1 Divide each side by '2'. z = -0.5 Simplifying z = -0.5Solution
z = {-9, -0.5}
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