(5v+9)(4-v)=0

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


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

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

Multiply (9 + 5v) * (4 + -1v)
(9(4 + -1v) + 5v * (4 + -1v)) = 0
((4 * 9 + -1v * 9) + 5v * (4 + -1v)) = 0
((36 + -9v) + 5v * (4 + -1v)) = 0
(36 + -9v + (4 * 5v + -1v * 5v)) = 0
(36 + -9v + (20v + -5v2)) = 0

Combine like terms: -9v + 20v = 11v
(36 + 11v + -5v2) = 0

Solving
36 + 11v + -5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(4 + -1v)(9 + 5v) = 0

Subproblem 1

Set the factor '(4 + -1v)' equal to zero and attempt to solve: Simplifying 4 + -1v = 0 Solving 4 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1v = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1v = 0 + -4 -1v = 0 + -4 Combine like terms: 0 + -4 = -4 -1v = -4 Divide each side by '-1'. v = 4 Simplifying v = 4

Subproblem 2

Set the factor '(9 + 5v)' equal to zero and attempt to solve: Simplifying 9 + 5v = 0 Solving 9 + 5v = 0 Move all terms containing v to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 5v = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 5v = 0 + -9 5v = 0 + -9 Combine like terms: 0 + -9 = -9 5v = -9 Divide each side by '5'. v = -1.8 Simplifying v = -1.8

Solution

v = {4, -1.8}

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