Barber Ingram
10/09/2023 · Senior High School
17. Find the greatest common monomial factor. \( 45 a b^{2} c^{3} \) and \( 27 a b^{3} c^{4} \) a \( 9 a^{3} b c^{2} \) b \( 3 a b^{3} c^{2} \) c \( 9 a b^{2} c^{3} \) d \( 3 a^{2} b c^{3} \)
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Step-by-step Solution
To find the greatest common monomial factor (GCMF) of the two expressions \( 45 a b^{2} c^{3} \) and \( 27 a b^{3} c^{4} \), we will break down each term into its prime factors and then identify the common factors.
1. **Factor the coefficients:**
- \( 45 = 3^2 \times 5 \)
- \( 27 = 3^3 \)
The GCF of the coefficients \( 45 \) and \( 27 \) is \( 9 \) (since \( 3^2 \) is the highest power of \( 3 \) that divides both).
2. **Identify the variable factors:**
- For \( a \): The minimum power of \( a \) in both terms is \( a^1 \).
- For \( b \): The minimum power of \( b \) in both terms is \( b^2 \) (since \( b^2 \) is in the first term and \( b^3 \) is in the second term).
- For \( c \): The minimum power of \( c \) in both terms is \( c^3 \) (since \( c^3 \) is in the first term and \( c^4 \) is in the second term).
3. **Combine the GCF of the coefficients and the variable factors:**
- GCMF = \( 9 a^1 b^2 c^3 \)
Thus, the greatest common monomial factor is:
\[
9 a b^{2} c^{3}
\]
Now, let's compare this with the provided options:
a) \( 9 a^{3} b c^{2} \)
b) \( 3 a b^{3} c^{2} \)
c) \( 9 a b^{2} c^{3} \)
d) \( 3 a^{2} b c^{3} \)
The correct answer is:
**c) \( 9 a b^{2} c^{3} \)**.
Quick Answer
The greatest common monomial factor is \( 9 a b^{2} c^{3} \).
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