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

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Solution for (7-v)(5v+9)=0 equation:


Simplifying
(7 + -1v)(5v + 9) = 0

Reorder the terms:
(7 + -1v)(9 + 5v) = 0

Multiply (7 + -1v) * (9 + 5v)
(7(9 + 5v) + -1v * (9 + 5v)) = 0
((9 * 7 + 5v * 7) + -1v * (9 + 5v)) = 0
((63 + 35v) + -1v * (9 + 5v)) = 0
(63 + 35v + (9 * -1v + 5v * -1v)) = 0
(63 + 35v + (-9v + -5v2)) = 0

Combine like terms: 35v + -9v = 26v
(63 + 26v + -5v2) = 0

Solving
63 + 26v + -5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(7 + -1v)(9 + 5v) = 0

Subproblem 1

Set the factor '(7 + -1v)' equal to zero and attempt to solve: Simplifying 7 + -1v = 0 Solving 7 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1v = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1v = 0 + -7 -1v = 0 + -7 Combine like terms: 0 + -7 = -7 -1v = -7 Divide each side by '-1'. v = 7 Simplifying v = 7

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 = {7, -1.8}

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