(9+v)(5v-2)=0

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Solution for (9+v)(5v-2)=0 equation: 


Simplifying
(9 + v)(5v + -2) = 0

Reorder the terms:
(9 + v)(-2 + 5v) = 0

Multiply (9 + v) * (-2 + 5v)
(9(-2 + 5v) + v(-2 + 5v)) = 0
((-2 * 9 + 5v * 9) + v(-2 + 5v)) = 0
((-18 + 45v) + v(-2 + 5v)) = 0
(-18 + 45v + (-2 * v + 5v * v)) = 0
(-18 + 45v + (-2v + 5v2)) = 0

Combine like terms: 45v + -2v = 43v
(-18 + 43v + 5v2) = 0

Solving
-18 + 43v + 5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(-9 + -1v)(2 + -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 '(2 + -5v)' equal to zero and attempt to solve:

Simplifying
2 + -5v = 0

Solving
2 + -5v = 0

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

Add '-2' to each side of the equation.
2 + -2 + -5v = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -5v = 0 + -2
-5v = 0 + -2

Combine like terms: 0 + -2 = -2
-5v = -2

Divide each side by '-5'.
v = 0.4

Simplifying
v = 0.4
Solution
v = {-9, 0.4}

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