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Simplify. (7v-21)/(v-3)*(v+10)/(7v-42)

Simplify. 7v21v3v+107v42 \frac{7 v-21}{v-3} \cdot \frac{v+10}{7 v-42}

Full solution

Q. Simplify. 7v21v3v+107v42 \frac{7 v-21}{v-3} \cdot \frac{v+10}{7 v-42}
  1. Factor Common Factors: Factor out the common factors in the numerators and denominators.\newlineThe expression given is (7v21)/(v3)(v+10)/(7v42)(7v-21)/(v-3)\cdot(v+10)/(7v-42). We can factor out a 77 from the terms 7v217v-21 and 7v427v-42, and we can factor out a 33 from the term v3v-3.
  2. Factoring Numerators and Denominators: Factoring the numerators and denominators.\newlineThe factored form of 7v217v-21 is 7(v3)7(v-3) because 7×(v3)=7v217 \times (v-3) = 7v-21.\newlineThe factored form of 7v427v-42 is 7(v6)7(v-6) because 7×(v6)=7v427 \times (v-6) = 7v-42.\newlineThe denominator v3v-3 is already factored.\newlineNow we rewrite the expression with the factored terms:\newline7(v3)v3×v+107(v6)\frac{7(v-3)}{v-3}\times\frac{v+10}{7(v-6)}
  3. Cancel Common Factors: Cancel out the common factors.\newlineWe can cancel the (v3)(v-3) term in the numerator of the first fraction with the (v3)(v-3) in the denominator because they are the same and not equal to zero (since vv cannot be 33, otherwise the denominator would be zero which is not allowed).\newlineNow we have:\newline7(v+10)7(v6)\frac{7\cdot(v+10)}{7(v-6)}
  4. Cancel Factor of 77: Cancel out the common factor of 77.\newlineWe can cancel the 77 in the numerator with the 77 in the denominator.\newlineNow the expression simplifies to:\newline(v+10)/(v6)(v+10)/(v-6)
  5. Check Further Simplifications: Check for any further simplifications.\newlineThe expression (v+10)/(v6)(v+10)/(v-6) cannot be simplified further because there are no common factors left to cancel out.

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