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Sagot :
To simplify the expression [tex]\(2 a^2 b^3 \left( 4 a^2 + 3 a b^2 - a b \right)\)[/tex], we'll use the distributive property, which states that [tex]\(a(b+c) = ab + ac\)[/tex]. We'll distribute [tex]\(2 a^2 b^3\)[/tex] across each term inside the parentheses.
Let's start by expanding each term inside the parentheses:
[tex]\[ 2 a^2 b^3 (4 a^2) \][/tex]
[tex]\[ 2 a^2 b^3 (3 a b^2) \][/tex]
[tex]\[ 2 a^2 b^3 (-a b) \][/tex]
Now, we'll multiply each term one by one:
1. [tex]\( 2 a^2 b^3 \cdot 4 a^2 \)[/tex]
[tex]\[ = 2 \cdot 4 \cdot a^2 \cdot a^2 \cdot b^3 = 8 a^4 b^3 \][/tex]
2. [tex]\( 2 a^2 b^3 \cdot 3 a b^2 \)[/tex]
[tex]\[ = 2 \cdot 3 \cdot a^2 \cdot a \cdot b^3 \cdot b^2 = 6 a^3 b^5 \][/tex]
3. [tex]\( 2 a^2 b^3 \cdot (-a b) \)[/tex]
[tex]\[ = 2 \cdot (-1) \cdot a^2 \cdot a \cdot b^3 \cdot b = -2 a^3 b^4 \][/tex]
Now, combine all the expanded terms together:
[tex]\[ 8 a^4 b^3 + 6 a^3 b^5 - 2 a^3 b^4 \][/tex]
Now, match this solution with the provided multiple choice options:
A. [tex]\( 8 a^4 b^3 + 6 a^3 b^5 - 2 a^3 b^4 \)[/tex]
B. [tex]\( 8 a^4 b^5 + 3 a^3 b^5 + 2 a^3 b^4 \)[/tex]
C. [tex]\( 8 a^4 b^5 + 3 a^3 b^5 - 2 a^3 b^4 \)[/tex]
D. [tex]\( 8 a^4 b^3 + 6 a^3 b^5 + 2 a^3 b^4 \)[/tex]
We see that Option A matches our simplified expression exactly.
Therefore, the answer is:
[tex]\[ \boxed{A} \][/tex]
Let's start by expanding each term inside the parentheses:
[tex]\[ 2 a^2 b^3 (4 a^2) \][/tex]
[tex]\[ 2 a^2 b^3 (3 a b^2) \][/tex]
[tex]\[ 2 a^2 b^3 (-a b) \][/tex]
Now, we'll multiply each term one by one:
1. [tex]\( 2 a^2 b^3 \cdot 4 a^2 \)[/tex]
[tex]\[ = 2 \cdot 4 \cdot a^2 \cdot a^2 \cdot b^3 = 8 a^4 b^3 \][/tex]
2. [tex]\( 2 a^2 b^3 \cdot 3 a b^2 \)[/tex]
[tex]\[ = 2 \cdot 3 \cdot a^2 \cdot a \cdot b^3 \cdot b^2 = 6 a^3 b^5 \][/tex]
3. [tex]\( 2 a^2 b^3 \cdot (-a b) \)[/tex]
[tex]\[ = 2 \cdot (-1) \cdot a^2 \cdot a \cdot b^3 \cdot b = -2 a^3 b^4 \][/tex]
Now, combine all the expanded terms together:
[tex]\[ 8 a^4 b^3 + 6 a^3 b^5 - 2 a^3 b^4 \][/tex]
Now, match this solution with the provided multiple choice options:
A. [tex]\( 8 a^4 b^3 + 6 a^3 b^5 - 2 a^3 b^4 \)[/tex]
B. [tex]\( 8 a^4 b^5 + 3 a^3 b^5 + 2 a^3 b^4 \)[/tex]
C. [tex]\( 8 a^4 b^5 + 3 a^3 b^5 - 2 a^3 b^4 \)[/tex]
D. [tex]\( 8 a^4 b^3 + 6 a^3 b^5 + 2 a^3 b^4 \)[/tex]
We see that Option A matches our simplified expression exactly.
Therefore, the answer is:
[tex]\[ \boxed{A} \][/tex]
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