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# Radical and rational equations — Basic example

Watch Sal work through a basic Radical and rational equations problem.

## Want to join the conversation?

• Why is it called RATIONAL equations instead of just, say, equations?
• It's a description helping to classify what kind of equation it is. The term "rational equation" indicates that there is a denominator in the equation.
• I'm confused, if we're multiplying both sides by 4k-3, why does the 11 remain?
• If you multiply 3/2 by 2, what do you get? 3.

If you multiply 15/31 by 31, what do you get? 15.

If you multiply 11/(4k-3) by (4k-3), what do you get? 11.
• Don't you guys know the criss cross method?
• I'm still waiting for the other methods he talked about😂
(1 vote)
• it took 5sec to solve. 🥷
• why do we leave the answer in improper fraction instead of simplifying?
(1 vote)
• Since 17 is a prime number, the fraction can not be simplified. Also, in math, mixed numbers are not the preferred method of displaying fractions because mixed numbers sometimes look similar to improper fractions. 3 and 1/2 (which is 3.5) looks quite similar to 31/2 (which is 15.5).
• do anyone know how to type square root symbol
(1 vote)
• On a mac, it's [OPTION + V]. On a windows desktop, it's [ALT+251] on the number pad. On anything, you can probably look up a square root symbol online and just copy and paste, or use the insert special character function on any word processor program you may be using.