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Simplifying (3z + 8)(7 + z) = 0 Reorder the terms: (8 + 3z)(7 + z) = 0 Multiply (8 + 3z) * (7 + z) (8(7 + z) + 3z * (7 + z)) = 0 ((7 * 8 + z * 8) + 3z * (7 + z)) = 0 ((56 + 8z) + 3z * (7 + z)) = 0 (56 + 8z + (7 * 3z + z * 3z)) = 0 (56 + 8z + (21z + 3z2)) = 0 Combine like terms: 8z + 21z = 29z (56 + 29z + 3z2) = 0 Solving 56 + 29z + 3z2 = 0 Solving for variable 'z'. Factor a trinomial. (7 + z)(8 + 3z) = 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 '(8 + 3z)' equal to zero and attempt to solve: Simplifying 8 + 3z = 0 Solving 8 + 3z = 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 + 3z = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 3z = 0 + -8 3z = 0 + -8 Combine like terms: 0 + -8 = -8 3z = -8 Divide each side by '3'. z = -2.666666667 Simplifying z = -2.666666667Solution
z = {-7, -2.666666667}
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