Select the correct answer.

Simplify the following expression:

[tex]\frac{2x^9 - 6x^3}{2x^3}[/tex]

A. [tex]-4x^6[/tex]
B. [tex]x^6 + 3[/tex]
C. [tex]x^6 - 6[/tex]
D. [tex]x^6 - 3[/tex]

Answer :

We start with the expression

[tex]$$
\frac{2x^9 - 6x^3}{2x^3}.
$$[/tex]

Step 1: Factor the Numerator

Notice that both terms in the numerator have a common factor of [tex]$2x^3$[/tex]. Factoring this out, we have:

[tex]$$
2x^9 - 6x^3 = 2x^3\left(x^6 - 3\right).
$$[/tex]

Step 2: Rewrite the Expression

Substitute the factored numerator into the expression:

[tex]$$
\frac{2x^3\left(x^6 - 3\right)}{2x^3}.
$$[/tex]

Step 3: Cancel the Common Factor

The factor [tex]$2x^3$[/tex] appears in both the numerator and the denominator, so they cancel (provided that [tex]$x \neq 0$[/tex]):

[tex]$$
\frac{2x^3\left(x^6 - 3\right)}{2x^3} = x^6 - 3.
$$[/tex]

Final Answer

The simplified expression is

[tex]$$
x^6 - 3,
$$[/tex]

which corresponds to option D.