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Sagot :
Let's evaluate the expression [tex]\(\frac{3(x+4)(x+1)}{(x+2)(x-2)}\)[/tex] for [tex]\(x = 4\)[/tex].
1. Substitute [tex]\(x = 4\)[/tex] into each part of the expression:
[tex]\(\text{Numerator: } 3(x+4)(x+1)\)[/tex]
[tex]\[ 3(4+4)(4+1) \][/tex]
[tex]\(\text{Denominator: } (x+2)(x-2)\)[/tex]
[tex]\[ (4+2)(4-2) \][/tex]
2. Simplify the expressions inside the parentheses:
[tex]\(\text{Numerator: } 3(8)(5)\)[/tex]
[tex]\[ 3 \cdot 8 \cdot 5 = 120 \][/tex]
[tex]\(\text{Denominator: } 6 \cdot 2\)[/tex]
[tex]\[ 6 \cdot 2 = 12 \][/tex]
3. Calculate the final result by dividing the numerator by the denominator:
[tex]\[ \frac{120}{12} = 10 \][/tex]
Therefore, the value of [tex]\(\frac{3(x+4)(x+1)}{(x+2)(x-2)}\)[/tex] for [tex]\(x=4\)[/tex] is [tex]\(10\)[/tex]. Thus, the correct answer is:
B. 10
1. Substitute [tex]\(x = 4\)[/tex] into each part of the expression:
[tex]\(\text{Numerator: } 3(x+4)(x+1)\)[/tex]
[tex]\[ 3(4+4)(4+1) \][/tex]
[tex]\(\text{Denominator: } (x+2)(x-2)\)[/tex]
[tex]\[ (4+2)(4-2) \][/tex]
2. Simplify the expressions inside the parentheses:
[tex]\(\text{Numerator: } 3(8)(5)\)[/tex]
[tex]\[ 3 \cdot 8 \cdot 5 = 120 \][/tex]
[tex]\(\text{Denominator: } 6 \cdot 2\)[/tex]
[tex]\[ 6 \cdot 2 = 12 \][/tex]
3. Calculate the final result by dividing the numerator by the denominator:
[tex]\[ \frac{120}{12} = 10 \][/tex]
Therefore, the value of [tex]\(\frac{3(x+4)(x+1)}{(x+2)(x-2)}\)[/tex] for [tex]\(x=4\)[/tex] is [tex]\(10\)[/tex]. Thus, the correct answer is:
B. 10
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