To multiply the polynomials \( (6s^4 + 15s^3)(6s^3 - 15s^4) \), we can use the distributive property and organize the results in a table format. We will multiply each term in the first polynomial by each term in the second polynomial and then combine like terms.
Step 1: Set up the table
| | \( 6s^3 \) | \( -15s^4 \) | |--------|------------|--------------| | \( 6s^4 \) | \( 36s^7 \) | \( -90s^8 \) | | \( 15s^3 \) | \( 90s^6 \) | \( -225s^7 \) |
Step 2: Fill in the products
- \( 6s^4 \cdot 6s^3 = 36s^7 \)
- \( 6s^4 \cdot -15s^4 = -90s^8 \)
- \( 15s^3 \cdot 6s^3 = 90s^6 \)
- \( 15s^3 \cdot -15s^4 = -225s^7 \)
Step 3: Combine like terms
Now we can combine like terms from the products:
- For \( s^8 \): \( -90s^8 \)
- For \( s^7 \): \( 36s^7 - 225s^7 = -189s^7 \)
- For \( s^6 \): \( 90s^6 \)
Final Expression:
Combining all the terms gives us the final result: \[ -90s^8 - 189s^7 + 90s^6 \]
Conclusion:
Thus, the product of the polynomials is: \[ \boxed{-90s^8 - 189s^7 + 90s^6} \]