(8-u)(4u-5)=0

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Solution for (8-u)(4u-5)=0 equation:


Simplifying
(8 + -1u)(4u + -5) = 0

Reorder the terms:
(8 + -1u)(-5 + 4u) = 0

Multiply (8 + -1u) * (-5 + 4u)
(8(-5 + 4u) + -1u * (-5 + 4u)) = 0
((-5 * 8 + 4u * 8) + -1u * (-5 + 4u)) = 0
((-40 + 32u) + -1u * (-5 + 4u)) = 0
(-40 + 32u + (-5 * -1u + 4u * -1u)) = 0
(-40 + 32u + (5u + -4u2)) = 0

Combine like terms: 32u + 5u = 37u
(-40 + 37u + -4u2) = 0

Solving
-40 + 37u + -4u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-8 + u)(5 + -4u) = 0

Subproblem 1

Set the factor '(-8 + u)' equal to zero and attempt to solve: Simplifying -8 + u = 0 Solving -8 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + u = 0 + 8 Combine like terms: -8 + 8 = 0 0 + u = 0 + 8 u = 0 + 8 Combine like terms: 0 + 8 = 8 u = 8 Simplifying u = 8

Subproblem 2

Set the factor '(5 + -4u)' equal to zero and attempt to solve: Simplifying 5 + -4u = 0 Solving 5 + -4u = 0 Move all terms containing u to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4u = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4u = 0 + -5 -4u = 0 + -5 Combine like terms: 0 + -5 = -5 -4u = -5 Divide each side by '-4'. u = 1.25 Simplifying u = 1.25

Solution

u = {8, 1.25}

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