Get premium membership and access revision papers with marking schemes, video lessons and live classes.
  OR
Processing. Please wait.

 Form 3 Mathematics lessons on surds

Simplification by rationalization of denominator

 (11m 8s)
1194 Views     SHARE

Download as pdf file

Answer Text:
SIMPLIFICATION BY RATIONALIZATION OF DENOMINATOR.
-As discussed earlier, rationalizing surds is achieved through multiplying the surds by their conjugates. When simplifying surds by rationalization of denominator, we multiply both the denominator and the numerator by the conjugate of the denominator.

Example 1
Simplify by rationalizing the denominator
#(sqrt 2 + sqrt 3)/(sqrt 6 - sqrt 3)#

Example 2. Simplify by rationalizing the denominator.
#(7 + sqrt 5)/(2 - sqrt 5)#


|