College

Divide and simplify.

[tex]\[
\frac{5x^6 - 15x^5 + 45x^2}{-5x^4}
\][/tex]

[tex]\[
\frac{5x^6 - 15x^5 + 45x^2}{-5x^4} = \square
\][/tex]

(Simplify your answer.)

Answer :

We start with the expression

[tex]$$
\frac{5x^6 - 15x^5 + 45x^2}{-5x^4}.
$$[/tex]

Step 1. Factor the numerator

Notice that each term in the numerator has a common factor of [tex]$5x^2$[/tex]. Factor it out:

[tex]$$
5x^6 - 15x^5 + 45x^2 = 5x^2 \left(x^4 - 3x^3 + 9\right).
$$[/tex]

Thus, the expression becomes

[tex]$$
\frac{5x^2 \left(x^4 - 3x^3 + 9\right)}{-5x^4}.
$$[/tex]

Step 2. Simplify by canceling common factors

First, cancel the factor of [tex]$5$[/tex]:

[tex]$$
\frac{5x^2 \left(x^4 - 3x^3 + 9\right)}{-5x^4} = \frac{x^2 \left(x^4 - 3x^3 + 9\right)}{-x^4}.
$$[/tex]

Next, simplify the power of [tex]$x$[/tex]. Notice that:

[tex]$$
\frac{x^2}{x^4} = \frac{1}{x^2}.
$$[/tex]

Thus, we have

[tex]$$
\frac{x^2 \left(x^4 - 3x^3 + 9\right)}{-x^4} = -\frac{x^4 - 3x^3 + 9}{x^2}.
$$[/tex]

Step 3. Write the expression in an expanded form

We can rewrite the simplified expression by splitting the fraction:

[tex]$$
-\frac{x^4}{x^2} + \frac{3x^3}{x^2} - \frac{9}{x^2}.
$$[/tex]

Simplify each term separately:

1. [tex]$\displaystyle \frac{x^4}{x^2} = x^2$[/tex],
2. [tex]$\displaystyle \frac{3x^3}{x^2} = 3x$[/tex],
3. [tex]$\displaystyle \frac{9}{x^2}$[/tex] remains the same.

Including the negative sign we obtain

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

Final Answer

The simplified form of the given expression is

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