Answer:
x = 3 or x = 9
Step-by-step explanation:
Solve for x over the real numbers:
(x - 9) (-2 x + 6) = 0
Split into two equations:
-2 x + 6 = 0 or x - 9 = 0
Factor constant terms from the left hand side:
-2 (x - 3) = 0 or x - 9 = 0
Divide both sides by -2:
x - 3 = 0 or x - 9 = 0
Add 3 to both sides:
x = 3 or x - 9 = 0
Add 9 to both sides:
Answer: x = 3 or x = 9
