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Simplifying (4u + -1)(4 + u) = 0 Reorder the terms: (-1 + 4u)(4 + u) = 0 Multiply (-1 + 4u) * (4 + u) (-1(4 + u) + 4u * (4 + u)) = 0 ((4 * -1 + u * -1) + 4u * (4 + u)) = 0 ((-4 + -1u) + 4u * (4 + u)) = 0 (-4 + -1u + (4 * 4u + u * 4u)) = 0 (-4 + -1u + (16u + 4u2)) = 0 Combine like terms: -1u + 16u = 15u (-4 + 15u + 4u2) = 0 Solving -4 + 15u + 4u2 = 0 Solving for variable 'u'. Factor a trinomial. (-4 + -1u)(1 + -4u) = 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 '(1 + -4u)' equal to zero and attempt to solve: Simplifying 1 + -4u = 0 Solving 1 + -4u = 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 + -4u = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4u = 0 + -1 -4u = 0 + -1 Combine like terms: 0 + -1 = -1 -4u = -1 Divide each side by '-4'. u = 0.25 Simplifying u = 0.25Solution
u = {-4, 0.25}
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