(5u+8)(9-u)=0

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Solution for (5u+8)(9-u)=0 equation:


Simplifying
(5u + 8)(9 + -1u) = 0

Reorder the terms:
(8 + 5u)(9 + -1u) = 0

Multiply (8 + 5u) * (9 + -1u)
(8(9 + -1u) + 5u * (9 + -1u)) = 0
((9 * 8 + -1u * 8) + 5u * (9 + -1u)) = 0
((72 + -8u) + 5u * (9 + -1u)) = 0
(72 + -8u + (9 * 5u + -1u * 5u)) = 0
(72 + -8u + (45u + -5u2)) = 0

Combine like terms: -8u + 45u = 37u
(72 + 37u + -5u2) = 0

Solving
72 + 37u + -5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(9 + -1u)(8 + 5u) = 0

Subproblem 1

Set the factor '(9 + -1u)' equal to zero and attempt to solve: Simplifying 9 + -1u = 0 Solving 9 + -1u = 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 + -1u = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1u = 0 + -9 -1u = 0 + -9 Combine like terms: 0 + -9 = -9 -1u = -9 Divide each side by '-1'. u = 9 Simplifying u = 9

Subproblem 2

Set the factor '(8 + 5u)' equal to zero and attempt to solve: Simplifying 8 + 5u = 0 Solving 8 + 5u = 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 + 5u = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 5u = 0 + -8 5u = 0 + -8 Combine like terms: 0 + -8 = -8 5u = -8 Divide each side by '5'. u = -1.6 Simplifying u = -1.6

Solution

u = {9, -1.6}

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