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

Solution for (5v-9)(1+v)=0 equation:

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

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

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

Combine like terms: -9v + 5v = -4v
(-9 + -4v + 5v2) = 0

Solving
-9 + -4v + 5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(-1 + -1v)(9 + -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 '(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 = {-1, 1.8}