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

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


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

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

Multiply (4 + u) * (5 + 4u)
(4(5 + 4u) + u(5 + 4u)) = 0
((5 * 4 + 4u * 4) + u(5 + 4u)) = 0
((20 + 16u) + u(5 + 4u)) = 0
(20 + 16u + (5 * u + 4u * u)) = 0
(20 + 16u + (5u + 4u2)) = 0

Combine like terms: 16u + 5u = 21u
(20 + 21u + 4u2) = 0

Solving
20 + 21u + 4u2 = 0

Solving for variable 'u'.

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

Subproblem 1

Set the factor '(4 + u)' equal to zero and attempt to solve: Simplifying 4 + u = 0 Solving 4 + u = 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 + u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + u = 0 + -4 u = 0 + -4 Combine like terms: 0 + -4 = -4 u = -4 Simplifying u = -4

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 = {-4, -1.25}

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