Recall that in general (a+b)2 ≠ a2+b2
Example 0.1 let a = 3 and b = 4
We do not want to leave roots in the denominator of a
fraction. When we
encounter a single root in the denominator just multiply the top and bottom
of the fraction by a value that will create an integer in the denominator.
Definition 0.1 The conjugate of a + b is a - b.
When the denominator contain two terms , we rationalize the denominator
by multiplying the top and bottom of the fraction by the conjugate of de-