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Which expression is equivalent to [tex]\frac{\left(4 g^3 h^2 k^4\right)^3}{8 g^3 h^2}-\left(h^5 k^3\right)^5[/tex]?

A. [tex]8 g^2 h^3 k^7 - h^{10} k^8[/tex]

B. [tex]8 g^9 h^7 k^7 - h^{10} k^8[/tex]

C. [tex]8 g^3 h^3 k^{12} - h^{25} k^{15}[/tex]

D. [tex]8 g^6 h^4 k^{12} - h^{25} k^{15}[/tex]


Sagot :

To solve the given expression, we need to perform a detailed step-by-step simplification. The given expression is:

[tex]\[ \frac{(4 g^3 h^2 k^4)^3}{8 g^3 h^2} - (h^5 k^3)^5 \][/tex]

Let's break it down into parts:

### Step 1: Simplify the Numerator [tex]\((4 g^3 h^2 k^4)^3\)[/tex]

First, take powers of each term inside the parentheses:

[tex]\[ (4 g^3 h^2 k^4)^3 = 4^3 (g^3)^3 (h^2)^3 (k^4)^3 \][/tex]

Simplifying each part:

[tex]\[ 4^3 = 64, \quad (g^3)^3 = g^9, \quad (h^2)^3 = h^6, \quad (k^4)^3 = k^{12} \][/tex]

So the simplified form of the numerator is:

[tex]\[ 64 g^9 h^6 k^{12} \][/tex]

### Step 2: Simplify the Fraction

Now we have:

[tex]\[ \frac{64 g^9 h^6 k^{12}}{8 g^3 h^2} \][/tex]

Perform the division for each term separately:

[tex]\[ \frac{64}{8} = 8, \quad \frac{g^9}{g^3} = g^{9-3} = g^6, \quad \frac{h^6}{h^2} = h^{6-2} = h^4, \quad \frac{k^{12}}{} = k^{12} \][/tex]

So the simplified form of the fraction is:

[tex]\[ 8 g^6 h^4 k^{12} \][/tex]

### Step 3: Simplify the Second Term [tex]\((h^5 k^3)^5\)[/tex]

Take powers of each term inside the parentheses:

[tex]\[ (h^5 k^3)^5 = (h^5)^5 (k^3)^5 \][/tex]

Simplify each part:

[tex]\[ (h^5)^5 = h^{25}, \quad (k^3)^5 = k^{15} \][/tex]

So the simplified form is:

[tex]\[ h^{25} k^{15} \][/tex]

### Step 4: Combine the Terms and Perform the Subtraction

Now we have:

[tex]\[ 8 g^6 h^4 k^{12} - h^{25} k^{15} \][/tex]

This expression cannot be simplified further because the terms are not like terms. Hence, the final simplified form for the given expression is:

[tex]\[ 8 g^6 h^4 k^{12} - h^{25} k^{15} \][/tex]

Comparing this with the given options:

[tex]\[ 8 g^2 h^3 k^7 - h^{10} k^8 \][/tex]
[tex]\[ 8 g^9 h^7 k^7 - h^{10} k^8 \][/tex]
[tex]\[ 8 g^3 h^3 k^{12} - h^{25} k^{15} \][/tex]
[tex]\[ 8 g^6 h^4 k^{12} - h^{25} k^{15} \][/tex]

The correct answer is:

[tex]\[ 8 g^6 h^4 k^{12} - h^{25} k^{15} \][/tex]