Find solutions to your problems with the help of IDNLearn.com's knowledgeable users. Our platform is designed to provide reliable and thorough answers to all your questions, no matter the topic.

Which expression is equivalent to [tex]\frac{-9 x^{-1} y^{-9}}{-15 x^5 y^{-3}}[/tex]?

Assume [tex]x \neq 0, y \neq 0[/tex].

A. [tex]\frac{3}{5 x^5 y^3}[/tex]
B. [tex]\frac{3}{5 x^6 y^6}[/tex]
C. [tex]\frac{5}{3 x^5 y^3}[/tex]
D. [tex]\frac{5}{3 x^6 y^6}[/tex]


Sagot :

To determine which expression is equivalent to [tex]\(\frac{-9 x^{-1} y^{-9}}{-15 x^5 y^{-3}}\)[/tex], we need to simplify this fraction step-by-step.

### Step 1: Simplify the Coefficient
Firstly, let's simplify the numerical part of the fraction [tex]\(\frac{-9}{-15}\)[/tex]:

[tex]\[ \frac{-9}{-15} = \frac{9}{15} = \frac{3}{5} \][/tex]

So the coefficient simplifies to [tex]\(\frac{3}{5}\)[/tex].

### Step 2: Simplify the [tex]\(x\)[/tex] Terms
Next, we simplify the [tex]\(x\)[/tex] terms in the numerator and the denominator. We have [tex]\(x^{-1}\)[/tex] in the numerator and [tex]\(x^5\)[/tex] in the denominator:

[tex]\[ \frac{x^{-1}}{x^5} = x^{-1 - 5} = x^{-6} \][/tex]

### Step 3: Simplify the [tex]\(y\)[/tex] Terms
Then, we simplify the [tex]\(y\)[/tex] terms in the numerator and the denominator. We have [tex]\(y^{-9}\)[/tex] in the numerator and [tex]\(y^{-3}\)[/tex] in the denominator:

[tex]\[ \frac{y^{-9}}{y^{-3}} = y^{-9 - (-3)} = y^{-9 + 3} = y^{-6} \][/tex]

### Step 4: Combine Results
Having simplified the coefficients and the variables, we combine them:

[tex]\[ \frac{-9 x^{-1} y^{-9}}{-15 x^5 y^{-3}} = \frac{3}{5} x^{-6} y^{-6} \][/tex]

Or in a more standard form, using positive exponents:

[tex]\[ \frac{3}{5 x^6 y^6} \][/tex]

### Conclusion
Thus, the given expression [tex]\(\frac{-9 x^{-1} y^{-9}}{-15 x^5 y^{-3}}\)[/tex] simplifies to:

[tex]\[ \frac{3}{5 x^6 y^6} \][/tex]

The correct choice is:
[tex]\[ \boxed{\frac{3}{5 x^6 y^6}} \][/tex]