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Simplify the following expression:

[tex]\[ \frac{\left(2x \cdot x^{1/2}\right)^3}{4x^2} \][/tex]


Sagot :

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

The original expression is:
[tex]\[ \frac{(2x \cdot x^{1/2})^3}{4x^2} \][/tex]

### Step 1: Simplify the numerator
First, consider the inside of the numerator:

[tex]\[ 2x \cdot x^{1/2} \][/tex]

We can multiply the terms with the same base (i.e., [tex]\(x\)[/tex]) by adding their exponents:

[tex]\[ 2x \cdot x^{1/2} = 2x^{1 + 1/2} = 2x^{3/2} \][/tex]

Now, raise this result to the power of 3:

[tex]\[ (2x^{3/2})^3 \][/tex]

Apply the exponentiation rules, where you distribute the exponent across the product and multiply the exponents:

[tex]\[ (2^3) \cdot (x^{3/2})^3 = 8 \cdot x^{(3/2) \cdot 3} = 8x^{9/2} \][/tex]

So, the numerator simplifies to:

[tex]\[ 8x^{9/2} \][/tex]

### Step 2: Simplify the denominator

The denominator is:

[tex]\[ 4x^2 \][/tex]

### Step 3: Combine the simplified numerator and denominator

Now we have the expression:

[tex]\[ \frac{8x^{9/2}}{4x^2} \][/tex]

### Step 4: Simplify the fraction

Divide both the coefficient and the powers of [tex]\(x\)[/tex]:

[tex]\[ \frac{8}{4} \cdot \frac{x^{9/2}}{x^2} = 2 \cdot x^{(9/2 - 2)} \][/tex]

Simplify the exponent of [tex]\(x\)[/tex]:

[tex]\[ 9/2 - 2 = 9/2 - 4/2 = 5/2 \][/tex]

So, the expression becomes:

[tex]\[ 2x^{5/2} \][/tex]

Thus, the simplified form of the given expression is:

[tex]\[ 2x^{5/2} \][/tex]