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Sagot :
To solve the given expression:
[tex]\[ \frac{t-3}{t+4} \div \left(t^2 + 7t + 12\right) \][/tex]
we need to follow these steps:
1. Rewrite the division as multiplication by the reciprocal:
[tex]\[ \frac{t - 3}{t + 4} \div \left(t^2 + 7t + 12\right) \quad \text{becomes} \quad \frac{t - 3}{t + 4} \times \frac{1}{t^2 + 7t + 12} \][/tex]
2. Factorize [tex]\( t^2 + 7t + 12 \)[/tex]:
To factorize [tex]\( t^2 + 7t + 12 \)[/tex], we find the roots of the quadratic equation. The factors of 12 that add up to 7 are 3 and 4. Therefore,
[tex]\[ t^2 + 7t + 12 = (t + 3)(t + 4) \][/tex]
3. Substitute the factorized form back into the expression:
[tex]\[ \frac{t - 3}{t + 4} \times \frac{1}{(t + 3)(t + 4)} \][/tex]
4. Simplify the expression:
[tex]\[ \frac{t - 3}{t + 4} \times \frac{1}{(t + 3)(t+ 4)} = \frac{t - 3}{(t + 4)(t + 3)(t + 4)} \][/tex]
[tex]\[ = \frac{t - 3}{(t + 3)(t + 4)^2} \][/tex]
So, the quotient after simplification is:
[tex]\[ \frac{t - 3}{(t + 3)(t + 4)^2} \][/tex]
This matches our provided answer to the problem.
[tex]\[ \frac{t-3}{t+4} \div \left(t^2 + 7t + 12\right) \][/tex]
we need to follow these steps:
1. Rewrite the division as multiplication by the reciprocal:
[tex]\[ \frac{t - 3}{t + 4} \div \left(t^2 + 7t + 12\right) \quad \text{becomes} \quad \frac{t - 3}{t + 4} \times \frac{1}{t^2 + 7t + 12} \][/tex]
2. Factorize [tex]\( t^2 + 7t + 12 \)[/tex]:
To factorize [tex]\( t^2 + 7t + 12 \)[/tex], we find the roots of the quadratic equation. The factors of 12 that add up to 7 are 3 and 4. Therefore,
[tex]\[ t^2 + 7t + 12 = (t + 3)(t + 4) \][/tex]
3. Substitute the factorized form back into the expression:
[tex]\[ \frac{t - 3}{t + 4} \times \frac{1}{(t + 3)(t + 4)} \][/tex]
4. Simplify the expression:
[tex]\[ \frac{t - 3}{t + 4} \times \frac{1}{(t + 3)(t+ 4)} = \frac{t - 3}{(t + 4)(t + 3)(t + 4)} \][/tex]
[tex]\[ = \frac{t - 3}{(t + 3)(t + 4)^2} \][/tex]
So, the quotient after simplification is:
[tex]\[ \frac{t - 3}{(t + 3)(t + 4)^2} \][/tex]
This matches our provided answer to the problem.
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