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Simplifying (3z + 5)(z + 3) = 7 Reorder the terms: (5 + 3z)(z + 3) = 7 Reorder the terms: (5 + 3z)(3 + z) = 7 Multiply (5 + 3z) * (3 + z) (5(3 + z) + 3z * (3 + z)) = 7 ((3 * 5 + z * 5) + 3z * (3 + z)) = 7 ((15 + 5z) + 3z * (3 + z)) = 7 (15 + 5z + (3 * 3z + z * 3z)) = 7 (15 + 5z + (9z + 3z2)) = 7 Combine like terms: 5z + 9z = 14z (15 + 14z + 3z2) = 7 Solving 15 + 14z + 3z2 = 7 Solving for variable 'z'. Reorder the terms: 15 + -7 + 14z + 3z2 = 7 + -7 Combine like terms: 15 + -7 = 8 8 + 14z + 3z2 = 7 + -7 Combine like terms: 7 + -7 = 0 8 + 14z + 3z2 = 0 Factor a trinomial. (4 + z)(2 + 3z) = 0Subproblem 1
Set the factor '(4 + z)' equal to zero and attempt to solve: Simplifying 4 + z = 0 Solving 4 + z = 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 + z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + z = 0 + -4 z = 0 + -4 Combine like terms: 0 + -4 = -4 z = -4 Simplifying z = -4Subproblem 2
Set the factor '(2 + 3z)' equal to zero and attempt to solve: Simplifying 2 + 3z = 0 Solving 2 + 3z = 0 Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3z = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3z = 0 + -2 3z = 0 + -2 Combine like terms: 0 + -2 = -2 3z = -2 Divide each side by '3'. z = -0.6666666667 Simplifying z = -0.6666666667Solution
z = {-4, -0.6666666667}
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