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

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Solution for (9-u)(5u-4)=0 equation:


Simplifying
(9 + -1u)(5u + -4) = 0

Reorder the terms:
(9 + -1u)(-4 + 5u) = 0

Multiply (9 + -1u) * (-4 + 5u)
(9(-4 + 5u) + -1u * (-4 + 5u)) = 0
((-4 * 9 + 5u * 9) + -1u * (-4 + 5u)) = 0
((-36 + 45u) + -1u * (-4 + 5u)) = 0
(-36 + 45u + (-4 * -1u + 5u * -1u)) = 0
(-36 + 45u + (4u + -5u2)) = 0

Combine like terms: 45u + 4u = 49u
(-36 + 49u + -5u2) = 0

Solving
-36 + 49u + -5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-9 + u)(4 + -5u) = 0

Subproblem 1

Set the factor '(-9 + u)' equal to zero and attempt to solve: Simplifying -9 + u = 0 Solving -9 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + u = 0 + 9 Combine like terms: -9 + 9 = 0 0 + u = 0 + 9 u = 0 + 9 Combine like terms: 0 + 9 = 9 u = 9 Simplifying u = 9

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 = {9, 0.8}

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