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

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


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

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

Multiply (5 + -1u) * (4 + 5u)
(5(4 + 5u) + -1u * (4 + 5u)) = 0
((4 * 5 + 5u * 5) + -1u * (4 + 5u)) = 0
((20 + 25u) + -1u * (4 + 5u)) = 0
(20 + 25u + (4 * -1u + 5u * -1u)) = 0
(20 + 25u + (-4u + -5u2)) = 0

Combine like terms: 25u + -4u = 21u
(20 + 21u + -5u2) = 0

Solving
20 + 21u + -5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(5 + -1u)(4 + 5u) = 0

Subproblem 1

Set the factor '(5 + -1u)' equal to zero and attempt to solve: Simplifying 5 + -1u = 0 Solving 5 + -1u = 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 + -1u = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1u = 0 + -5 -1u = 0 + -5 Combine like terms: 0 + -5 = -5 -1u = -5 Divide each side by '-1'. u = 5 Simplifying u = 5

Subproblem 2

Set the factor '(4 + 5u)' equal to zero and attempt to solve: Simplifying 4 + 5u = 0 Solving 4 + 5u = 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 + 5u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5u = 0 + -4 5u = 0 + -4 Combine like terms: 0 + -4 = -4 5u = -4 Divide each side by '5'. u = -0.8 Simplifying u = -0.8

Solution

u = {5, -0.8}

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