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Simplifying (3u + 4)(7 + u) = 0 Reorder the terms: (4 + 3u)(7 + u) = 0 Multiply (4 + 3u) * (7 + u) (4(7 + u) + 3u * (7 + u)) = 0 ((7 * 4 + u * 4) + 3u * (7 + u)) = 0 ((28 + 4u) + 3u * (7 + u)) = 0 (28 + 4u + (7 * 3u + u * 3u)) = 0 (28 + 4u + (21u + 3u2)) = 0 Combine like terms: 4u + 21u = 25u (28 + 25u + 3u2) = 0 Solving 28 + 25u + 3u2 = 0 Solving for variable 'u'. Factor a trinomial. (7 + u)(4 + 3u) = 0Subproblem 1
Set the factor '(7 + u)' equal to zero and attempt to solve: Simplifying 7 + u = 0 Solving 7 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + u = 0 + -7 Combine like terms: 7 + -7 = 0 0 + u = 0 + -7 u = 0 + -7 Combine like terms: 0 + -7 = -7 u = -7 Simplifying u = -7Subproblem 2
Set the factor '(4 + 3u)' equal to zero and attempt to solve: Simplifying 4 + 3u = 0 Solving 4 + 3u = 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 + 3u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3u = 0 + -4 3u = 0 + -4 Combine like terms: 0 + -4 = -4 3u = -4 Divide each side by '3'. u = -1.333333333 Simplifying u = -1.333333333Solution
u = {-7, -1.333333333}
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