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