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Simplify the expression:

[tex]\[ \frac{18 x^4 - 8 x^2 y^2}{12 x^4 y - 16 x^3 y^2} \][/tex]


Sagot :

Certainly! Let's simplify the given algebraic expression step-by-step:

The expression is:
[tex]\[ \frac{18 x^4 - 8 x^2 y^2}{12 x^4 y - 16 x^3 y^2} \][/tex]

### Step 1: Factorize the numerator and the denominator

First, let's look at the numerator, [tex]\(18 x^4 - 8 x^2 y^2\)[/tex]:

- Both terms [tex]\(18 x^4\)[/tex] and [tex]\(-8 x^2 y^2\)[/tex] have a common factor of [tex]\(2 x^2\)[/tex].
- Factor out [tex]\(2 x^2\)[/tex]:
[tex]\[ 18 x^4 - 8 x^2 y^2 = 2 x^2 (9 x^2 - 4 y^2) \][/tex]

Now, the denominator, [tex]\(12 x^4 y - 16 x^3 y^2\)[/tex]:

- Both terms [tex]\(12 x^4 y\)[/tex] and [tex]\(-16 x^3 y^2\)[/tex] have a common factor of [tex]\(4 x^3 y\)[/tex].
- Factor out [tex]\(4 x^3 y\)[/tex]:
[tex]\[ 12 x^4 y - 16 x^3 y^2 = 4 x^3 y (3 x - 4 y) \][/tex]

Notice that we need to simplify both expressions further if possible.

### Step 2: Recognize special factorizations

The numerator [tex]\(9 x^2 - 4 y^2\)[/tex] is a difference of squares:
[tex]\[ 9 x^2 - 4 y^2 = (3x)^2 - (2y)^2 = (3x - 2y)(3x + 2y) \][/tex]

### Step 3: Substitute factorized forms back into the expression:

Now substitute back into the original fraction:
[tex]\[ \frac{2 x^2 (3x - 2y)(3x + 2y)}{4 x^3 y (3x - 4y)} \][/tex]

### Step 4: Simplify the fraction

- Firstly, cancel any common factors from the numerator and the denominator:

- Notice [tex]\(x^2\)[/tex] in the numerator cancels with [tex]\(x^3\)[/tex] in the denominator:

[tex]\[ \frac{2 (3x - 2y)(3x + 2y)}{4 x y (3x - 4y)} = \frac{(3x - 2y)(3x + 2y)}{2 x y (3x - 4y)} \][/tex]

- There are no more common factors to cancel, so the fraction is in its simplest form now.

### Final Answer:

Thus, the simplified form of the given expression is:

[tex]\[ \boxed{\frac{(3x - 2y)(3x + 2y)}{2 x y (3x - 4y)}} \][/tex]