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Simplifying (3z + -7)(z + 12) = 0 Reorder the terms: (-7 + 3z)(z + 12) = 0 Reorder the terms: (-7 + 3z)(12 + z) = 0 Multiply (-7 + 3z) * (12 + z) (-7(12 + z) + 3z * (12 + z)) = 0 ((12 * -7 + z * -7) + 3z * (12 + z)) = 0 ((-84 + -7z) + 3z * (12 + z)) = 0 (-84 + -7z + (12 * 3z + z * 3z)) = 0 (-84 + -7z + (36z + 3z2)) = 0 Combine like terms: -7z + 36z = 29z (-84 + 29z + 3z2) = 0 Solving -84 + 29z + 3z2 = 0 Solving for variable 'z'. Factor a trinomial. (-12 + -1z)(7 + -3z) = 0Subproblem 1
Set the factor '(-12 + -1z)' equal to zero and attempt to solve: Simplifying -12 + -1z = 0 Solving -12 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -1z = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -1z = 0 + 12 -1z = 0 + 12 Combine like terms: 0 + 12 = 12 -1z = 12 Divide each side by '-1'. z = -12 Simplifying z = -12Subproblem 2
Set the factor '(7 + -3z)' equal to zero and attempt to solve: Simplifying 7 + -3z = 0 Solving 7 + -3z = 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 + -3z = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3z = 0 + -7 -3z = 0 + -7 Combine like terms: 0 + -7 = -7 -3z = -7 Divide each side by '-3'. z = 2.333333333 Simplifying z = 2.333333333Solution
z = {-12, 2.333333333}
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