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Simplifying (4z + -2)(5 + z) = 0 Reorder the terms: (-2 + 4z)(5 + z) = 0 Multiply (-2 + 4z) * (5 + z) (-2(5 + z) + 4z * (5 + z)) = 0 ((5 * -2 + z * -2) + 4z * (5 + z)) = 0 ((-10 + -2z) + 4z * (5 + z)) = 0 (-10 + -2z + (5 * 4z + z * 4z)) = 0 (-10 + -2z + (20z + 4z2)) = 0 Combine like terms: -2z + 20z = 18z (-10 + 18z + 4z2) = 0 Solving -10 + 18z + 4z2 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '2'. 2(-5 + 9z + 2z2) = 0 Factor a trinomial. 2((-5 + -1z)(1 + -2z)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-5 + -1z)' equal to zero and attempt to solve: Simplifying -5 + -1z = 0 Solving -5 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1z = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1z = 0 + 5 -1z = 0 + 5 Combine like terms: 0 + 5 = 5 -1z = 5 Divide each side by '-1'. z = -5 Simplifying z = -5Subproblem 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 = {-5, 0.5}
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