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

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Solution for (1-v)(5v+7)=0 equation: 


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

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

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

Combine like terms: 5v + -7v = -2v
(7 + -2v + -5v2) = 0

Solving
7 + -2v + -5v2 = 0

Solving for variable 'v'.

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


Subproblem 1
Set the factor '(1 + -1v)' equal to zero and attempt to solve:

Simplifying
1 + -1v = 0

Solving
1 + -1v = 0

Move all terms containing v to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -1v = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1v = 0 + -1
-1v = 0 + -1

Combine like terms: 0 + -1 = -1
-1v = -1

Divide each side by '-1'.
v = 1

Simplifying
v = 1

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 = {1, -1.4}

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