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Simplifying (4 + -1u)(5u + 2) = 0 Reorder the terms: (4 + -1u)(2 + 5u) = 0 Multiply (4 + -1u) * (2 + 5u) (4(2 + 5u) + -1u * (2 + 5u)) = 0 ((2 * 4 + 5u * 4) + -1u * (2 + 5u)) = 0 ((8 + 20u) + -1u * (2 + 5u)) = 0 (8 + 20u + (2 * -1u + 5u * -1u)) = 0 (8 + 20u + (-2u + -5u2)) = 0 Combine like terms: 20u + -2u = 18u (8 + 18u + -5u2) = 0 Solving 8 + 18u + -5u2 = 0 Solving for variable 'u'. Factor a trinomial. (4 + -1u)(2 + 5u) = 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 '(2 + 5u)' equal to zero and attempt to solve: Simplifying 2 + 5u = 0 Solving 2 + 5u = 0 Move all terms containing u to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 5u = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 5u = 0 + -2 5u = 0 + -2 Combine like terms: 0 + -2 = -2 5u = -2 Divide each side by '5'. u = -0.4 Simplifying u = -0.4Solution
u = {4, -0.4}
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