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Simplifying (5u + -4)(9 + -1u) = 0 Reorder the terms: (-4 + 5u)(9 + -1u) = 0 Multiply (-4 + 5u) * (9 + -1u) (-4(9 + -1u) + 5u * (9 + -1u)) = 0 ((9 * -4 + -1u * -4) + 5u * (9 + -1u)) = 0 ((-36 + 4u) + 5u * (9 + -1u)) = 0 (-36 + 4u + (9 * 5u + -1u * 5u)) = 0 (-36 + 4u + (45u + -5u2)) = 0 Combine like terms: 4u + 45u = 49u (-36 + 49u + -5u2) = 0 Solving -36 + 49u + -5u2 = 0 Solving for variable 'u'. Factor a trinomial. (-9 + u)(4 + -5u) = 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 '(4 + -5u)' equal to zero and attempt to solve: Simplifying 4 + -5u = 0 Solving 4 + -5u = 0 Move all terms containing u to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -5u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5u = 0 + -4 -5u = 0 + -4 Combine like terms: 0 + -4 = -4 -5u = -4 Divide each side by '-5'. u = 0.8 Simplifying u = 0.8Solution
u = {9, 0.8}
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