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Which expression is equivalent to the following complex fraction?

[tex]\[
\frac{\frac{-2}{x}+\frac{5}{y}}{\frac{3}{y}-\frac{2}{x}}
\][/tex]

A. [tex]\(\frac{-2y + 5x}{3x - 2y}\)[/tex]

B. [tex]\(\frac{3x - 2y}{-2y + 5x}\)[/tex]

C. [tex]\(\frac{x^2 y^2}{(-2y + 5x)(3x - 2y)}\)[/tex]

D. [tex]\(\frac{(-2y + 5x)(3x - 2y)}{x^2 y^2}\)[/tex]


Sagot :

Alright, let's dissect and solve the given complex fraction step-by-step. We need to simplify the following expression:
[tex]\[ \frac{\frac{-2}{x}+\frac{5}{y}}{\frac{3}{y}-\frac{2}{x}} \][/tex]

### Step 1: Combine Fractions in Numerator and Denominator
First, we want to combine the fractions in both the numerator and the denominator:

#### Numerator:
[tex]\[ \frac{-2}{x} + \frac{5}{y} \][/tex]

To combine these, we get a common denominator, which is [tex]\( x \times y \)[/tex]:
[tex]\[ \frac{-2y}{xy} + \frac{5x}{xy} = \frac{-2y + 5x}{xy} \][/tex]

#### Denominator:
[tex]\[ \frac{3}{y} - \frac{2}{x} \][/tex]

Similarly, combining these with a common denominator of [tex]\( y \times x \)[/tex] yields:
[tex]\[ \frac{3x}{xy} - \frac{2y}{xy} = \frac{3x - 2y}{xy} \][/tex]

### Step 2: Simplify the Complex Fraction
Now we have:
[tex]\[ \frac{\frac{-2y + 5x}{xy}}{\frac{3x - 2y}{xy}} \][/tex]

To simplify this, we can divide the numerator by the denominator:
[tex]\[ \frac{\frac{-2y + 5x}{xy}}{\frac{3x - 2y}{xy}} = \frac{-2y + 5x}{3x - 2y} \][/tex]

### Step 3: Check the Expressions
From the simplification process, we see that our result is:
[tex]\[ \frac{-2y + 5x}{3x - 2y} \][/tex]

Comparing this with the given options:
[tex]\[ \frac{-2 y+5 x}{3 x-2 y} \][/tex]
[tex]\[ \frac{3 x-2 y}{-2 y+5 x} \][/tex]
[tex]\[ \frac{x^2 y^2}{(-2 y+5 x)(3 x-2 y)} \][/tex]
[tex]\[ \frac{(-2 y+5 x)(3 x-2 y)}{x^2 y^2} \][/tex]

We unequivocally see that:
[tex]\[ \frac{-2 y+5 x}{3 x-2 y} \][/tex]
matches our simplified expression. Therefore, the expression equivalent to the given complex fraction is:
[tex]\[ \boxed{\frac{-2 y+5 x}{3 x-2 y}} \][/tex]