To multiply the polynomials \((b + 8)(3b - 6)\), you can use the distributive property (also known as the FOIL method for binomials):
- First: \(b \cdot 3b = 3b^2\)
- Outer: \(b \cdot (-6) = -6b\)
- Inner: \(8 \cdot 3b = 24b\)
- Last: \(8 \cdot (-6) = -48\)
Now, combine all these results:
\[ 3b^2 - 6b + 24b - 48 \]
Next, combine the like terms \(-6b\) and \(24b\):
\[ 3b^2 + 18b - 48 \]
So, the simplified result of multiplying the polynomials \((b + 8)(3b - 6)\) is:
\[ \boxed{3b^2 + 18b - 48} \]