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Simplifying (7 + -1u)(3u + 1) = 0 Reorder the terms: (7 + -1u)(1 + 3u) = 0 Multiply (7 + -1u) * (1 + 3u) (7(1 + 3u) + -1u * (1 + 3u)) = 0 ((1 * 7 + 3u * 7) + -1u * (1 + 3u)) = 0 ((7 + 21u) + -1u * (1 + 3u)) = 0 (7 + 21u + (1 * -1u + 3u * -1u)) = 0 (7 + 21u + (-1u + -3u2)) = 0 Combine like terms: 21u + -1u = 20u (7 + 20u + -3u2) = 0 Solving 7 + 20u + -3u2 = 0 Solving for variable 'u'. Factor a trinomial. (7 + -1u)(1 + 3u) = 0Subproblem 1
Set the factor '(7 + -1u)' equal to zero and attempt to solve: Simplifying 7 + -1u = 0 Solving 7 + -1u = 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 + -1u = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1u = 0 + -7 -1u = 0 + -7 Combine like terms: 0 + -7 = -7 -1u = -7 Divide each side by '-1'. u = 7 Simplifying u = 7Subproblem 2
Set the factor '(1 + 3u)' equal to zero and attempt to solve: Simplifying 1 + 3u = 0 Solving 1 + 3u = 0 Move all terms containing u to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3u = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 3u = 0 + -1 3u = 0 + -1 Combine like terms: 0 + -1 = -1 3u = -1 Divide each side by '3'. u = -0.3333333333 Simplifying u = -0.3333333333Solution
u = {7, -0.3333333333}
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