MediumRational expressions

OpenStax, Elementary Algebra 2e §8.2 Multiply and Divide Rational Expressions · Exercise 55 · Algebra · Rational expressions

Multiply and Divide Rational Expressions · Exercise 55

ⓐ Multiply $\frac{7}{4} \cdot \frac{9}{10}$ and explain all your steps.
ⓑ Multiply $\frac{n}{n - 3} \cdot \frac{9}{n + 3}$ and explain all your steps.
ⓒ Evaluate your answer to part (b) when $n = 7.$ Did you get the same answer you got in part (a)? Why or why not?

This is an open-ended exercise: its source gives no single answer.

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OpenStax, Elementary Algebra 2e · §8.2 Multiply and Divide Rational Expressions · Exercise 55

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