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Simplifying (9 + u)(4u + 5) = 0 Reorder the terms: (9 + u)(5 + 4u) = 0 Multiply (9 + u) * (5 + 4u) (9(5 + 4u) + u(5 + 4u)) = 0 ((5 * 9 + 4u * 9) + u(5 + 4u)) = 0 ((45 + 36u) + u(5 + 4u)) = 0 (45 + 36u + (5 * u + 4u * u)) = 0 (45 + 36u + (5u + 4u2)) = 0 Combine like terms: 36u + 5u = 41u (45 + 41u + 4u2) = 0 Solving 45 + 41u + 4u2 = 0 Solving for variable 'u'. Factor a trinomial. (9 + u)(5 + 4u) = 0Subproblem 1
Set the factor '(9 + u)' equal to zero and attempt to solve: Simplifying 9 + u = 0 Solving 9 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + u = 0 + -9 Combine like terms: 9 + -9 = 0 0 + u = 0 + -9 u = 0 + -9 Combine like terms: 0 + -9 = -9 u = -9 Simplifying u = -9Subproblem 2
Set the factor '(5 + 4u)' equal to zero and attempt to solve: Simplifying 5 + 4u = 0 Solving 5 + 4u = 0 Move all terms containing u to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4u = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4u = 0 + -5 4u = 0 + -5 Combine like terms: 0 + -5 = -5 4u = -5 Divide each side by '4'. u = -1.25 Simplifying u = -1.25Solution
u = {-9, -1.25}
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