(9-x)(3x+5)=0

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Solution for (9-x)(3x+5)=0 equation: 


Simplifying
(9 + -1x)(3x + 5) = 0

Reorder the terms:
(9 + -1x)(5 + 3x) = 0

Multiply (9 + -1x) * (5 + 3x)
(9(5 + 3x) + -1x * (5 + 3x)) = 0
((5 * 9 + 3x * 9) + -1x * (5 + 3x)) = 0
((45 + 27x) + -1x * (5 + 3x)) = 0
(45 + 27x + (5 * -1x + 3x * -1x)) = 0
(45 + 27x + (-5x + -3x2)) = 0

Combine like terms: 27x + -5x = 22x
(45 + 22x + -3x2) = 0

Solving
45 + 22x + -3x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(9 + -1x)(5 + 3x) = 0


Subproblem 1
Set the factor '(9 + -1x)' equal to zero and attempt to solve:

Simplifying
9 + -1x = 0

Solving
9 + -1x = 0

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

Add '-9' to each side of the equation.
9 + -9 + -1x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 0 + -9
-1x = 0 + -9

Combine like terms: 0 + -9 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9

Subproblem 2
Set the factor '(5 + 3x)' equal to zero and attempt to solve:

Simplifying
5 + 3x = 0

Solving
5 + 3x = 0

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

Add '-5' to each side of the equation.
5 + -5 + 3x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 0 + -5
3x = 0 + -5

Combine like terms: 0 + -5 = -5
3x = -5

Divide each side by '3'.
x = -1.666666667

Simplifying
x = -1.666666667
Solution
x = {9, -1.666666667}

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