Simplify a rational expression

What is the first step when simplifying a rational expression involving cubes?

• Simplify the denominator first

• Factor out the greatest common factor (GCF)

• Multiply the numerator and denominator

• Add a constant to the expression

When simplifying the numerator, what was the GCF factored out?

• X^2

• 3X

• 2X

• 4

Why couldn't the expression X^2 + 2X + 4 be factored further?

• It is a prime polynomial

• It has no real roots

• It is already in its simplest form

• There are no two numbers that multiply to 4 and add to 2

What formula is used to simplify the denominator involving cubes?

• Difference of squares

• Quadratic formula

• Sum of cubes

• Difference of two cubes

What is the final simplified form of the rational expression?

• 3X / (X + 2)

• 3X / (X - 2)

• X^2 / (X - 2)

• X^2 + 2X + 4