Q68: Reduce the rational expression to lowest terms.<br>-<img
Q69: Perform the indicated operation and simplify.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8458/.jpg"
Q70: Perform the indicated operation and simplify.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8458/.jpg"
Q71: Simplify the expression by rationalizing the denominator.<br>-<img
Q72: Factor the sum or difference of two
Q74: Perform the indicated operations. Write answers using
Q75: Find the least common denominator.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8458/.jpg" alt="Find
Q76: Perform the operation indicated.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8458/.jpg" alt="Perform the
Q77: Find the least common denominator.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8458/.jpg" alt="Find
Q78: Perform the indicated operation and express in