How do you rationalize the denominator and simplify 12/(sqrt5-1)12√5−1?
2 Answers
Explanation:
Use the identities
a/a=1aa=1 for every non-zeroaa (a+b)(a-b) = a^2-b^2(a+b)(a−b)=a2−b2
to write
Now, as you can see, the numerator is
The denominator, instead, is written in the same form as the second property written at the beginning:
So, the fraction becomes
Explanation:
When having a root on the bottom with an extra