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

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


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

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

Multiply (9 + -1v) * (7 + 5v)
(9(7 + 5v) + -1v * (7 + 5v)) = 0
((7 * 9 + 5v * 9) + -1v * (7 + 5v)) = 0
((63 + 45v) + -1v * (7 + 5v)) = 0
(63 + 45v + (7 * -1v + 5v * -1v)) = 0
(63 + 45v + (-7v + -5v2)) = 0

Combine like terms: 45v + -7v = 38v
(63 + 38v + -5v2) = 0

Solving
63 + 38v + -5v2 = 0

Solving for variable 'v'.

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

Subproblem 1

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

Subproblem 2

Set the factor '(7 + 5v)' equal to zero and attempt to solve: Simplifying 7 + 5v = 0 Solving 7 + 5v = 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 + 5v = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 5v = 0 + -7 5v = 0 + -7 Combine like terms: 0 + -7 = -7 5v = -7 Divide each side by '5'. v = -1.4 Simplifying v = -1.4

Solution

v = {9, -1.4}

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