Fri April 15, 2011 By:

If the denominator is a+ rootb then to rationalize the denominator we multiply by a-rootb. is it true or false?

Expert Reply
Fri April 15, 2011
yes it is true when we multiply (a-rootb) with both numerator and denominator we get,
1/(a+rootb)*{(a-rootb)/(a-rootb)}=(a-rootb)/(a*a-b) which rationalize the denominator.
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