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Sagot :
To multiply the two rational expressions \(\frac{2x + 14}{9x + 2} \cdot \frac{3x + 27}{x + 7}\), follow these steps:
1. Factor Simplification:
- First, factor the numerators and denominators of each fraction if possible.
For \(2x + 14\):
[tex]\[ 2x + 14 = 2(x + 7) \][/tex]
For \(3x + 27\):
[tex]\[ 3x + 27 = 3(x + 9) \][/tex]
So the expression becomes:
[tex]\[ \frac{2(x + 7)}{9x + 2} \cdot \frac{3(x + 9)}{x + 7} \][/tex]
2. Cancel Common Factors:
- Identify and cancel out any common factors in the numerators and denominators.
Notice that \((x + 7)\) appears in both the numerator of the first fraction and the denominator of the second fraction, so they can be canceled. After canceling, the expression simplifies to:
[tex]\[ \frac{2 \cdot 3 (x + 9)}{9x + 2} \][/tex]
3. Multiply the Remaining Terms:
- Multiply what's left of the numerators together and the denominators together:
[tex]\[ \frac{2 \cdot 3 (x + 9)}{9x + 2} = \frac{6(x + 9)}{9x + 2} \][/tex]
Thus, the simplified form of the multiplication \(\frac{2x + 14}{9x + 2} \cdot \frac{3x + 27}{x + 7}\) is:
[tex]\[ \boxed{\frac{6(x + 9)}{9x + 2}} \][/tex]
1. Factor Simplification:
- First, factor the numerators and denominators of each fraction if possible.
For \(2x + 14\):
[tex]\[ 2x + 14 = 2(x + 7) \][/tex]
For \(3x + 27\):
[tex]\[ 3x + 27 = 3(x + 9) \][/tex]
So the expression becomes:
[tex]\[ \frac{2(x + 7)}{9x + 2} \cdot \frac{3(x + 9)}{x + 7} \][/tex]
2. Cancel Common Factors:
- Identify and cancel out any common factors in the numerators and denominators.
Notice that \((x + 7)\) appears in both the numerator of the first fraction and the denominator of the second fraction, so they can be canceled. After canceling, the expression simplifies to:
[tex]\[ \frac{2 \cdot 3 (x + 9)}{9x + 2} \][/tex]
3. Multiply the Remaining Terms:
- Multiply what's left of the numerators together and the denominators together:
[tex]\[ \frac{2 \cdot 3 (x + 9)}{9x + 2} = \frac{6(x + 9)}{9x + 2} \][/tex]
Thus, the simplified form of the multiplication \(\frac{2x + 14}{9x + 2} \cdot \frac{3x + 27}{x + 7}\) is:
[tex]\[ \boxed{\frac{6(x + 9)}{9x + 2}} \][/tex]
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