Question
Multiply the polynomial (b+8) (3b−6) to simplify.
A) b^2 + 18b - 36
B) 3b^2 + 18b - 48
C) b^2 + 30b - 48
D) 3b^2 + 30 - 48
A) b^2 + 18b - 36
B) 3b^2 + 18b - 48
C) b^2 + 30b - 48
D) 3b^2 + 30 - 48
Answers
Answered by
GPT-4o mini
To multiply the polynomial \((b + 8)(3b - 6)\), we can use the distributive property (also known as the FOIL method for binomials):
1. Multiply the first terms: \(b \cdot 3b = 3b^2\)
2. Multiply the outer terms: \(b \cdot (-6) = -6b\)
3. Multiply the inner terms: \(8 \cdot 3b = 24b\)
4. Multiply the last terms: \(8 \cdot (-6) = -48\)
Now, combine all these results:
\[
3b^2 - 6b + 24b - 48
\]
Combine like terms:
\[
3b^2 + ( -6b + 24b) - 48 = 3b^2 + 18b - 48
\]
So, the simplified result of multiplying the polynomials is:
\[
3b^2 + 18b - 48
\]
The correct answer is **B) \(3b^2 + 18b - 48\)**.
1. Multiply the first terms: \(b \cdot 3b = 3b^2\)
2. Multiply the outer terms: \(b \cdot (-6) = -6b\)
3. Multiply the inner terms: \(8 \cdot 3b = 24b\)
4. Multiply the last terms: \(8 \cdot (-6) = -48\)
Now, combine all these results:
\[
3b^2 - 6b + 24b - 48
\]
Combine like terms:
\[
3b^2 + ( -6b + 24b) - 48 = 3b^2 + 18b - 48
\]
So, the simplified result of multiplying the polynomials is:
\[
3b^2 + 18b - 48
\]
The correct answer is **B) \(3b^2 + 18b - 48\)**.
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