Question

Which one is in simplest form???

Answer 1

• (1). - x

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Simplify the expression as follows:

• 
  `\cfrac{x^3-9x}{9-x^2} =`
• 
  `\cfrac{x(x^2-9)}{9-x^2} =` Factor out x in the numerator
• 
  `\cfrac{-x(9-x^2)}{9-x^2} =` Multiply the numerator by - 1 twice
• 
  `-x` Cancel common factors

The matching choice is (1).