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Simplifying (8z + -14)(7z + -8) = 0 Reorder the terms: (-14 + 8z)(7z + -8) = 0 Reorder the terms: (-14 + 8z)(-8 + 7z) = 0 Multiply (-14 + 8z) * (-8 + 7z) (-14(-8 + 7z) + 8z * (-8 + 7z)) = 0 ((-8 * -14 + 7z * -14) + 8z * (-8 + 7z)) = 0 ((112 + -98z) + 8z * (-8 + 7z)) = 0 (112 + -98z + (-8 * 8z + 7z * 8z)) = 0 (112 + -98z + (-64z + 56z2)) = 0 Combine like terms: -98z + -64z = -162z (112 + -162z + 56z2) = 0 Solving 112 + -162z + 56z2 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '2'. 2(56 + -81z + 28z2) = 0 Factor a trinomial. 2((8 + -7z)(7 + -4z)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(8 + -7z)' equal to zero and attempt to solve: Simplifying 8 + -7z = 0 Solving 8 + -7z = 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 + -7z = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7z = 0 + -8 -7z = 0 + -8 Combine like terms: 0 + -8 = -8 -7z = -8 Divide each side by '-7'. z = 1.142857143 Simplifying z = 1.142857143Subproblem 2
Set the factor '(7 + -4z)' equal to zero and attempt to solve: Simplifying 7 + -4z = 0 Solving 7 + -4z = 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 + -4z = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4z = 0 + -7 -4z = 0 + -7 Combine like terms: 0 + -7 = -7 -4z = -7 Divide each side by '-4'. z = 1.75 Simplifying z = 1.75Solution
z = {1.142857143, 1.75}
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