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CBSE Class 9 Answered

sir i am unable to take out the answer of sums in roots.can you explain it to me.
Asked by Priyamvada Mathur | 05 Aug, 2012, 12:38: PM
answered-by-expert Expert Answer
The calculation becomes simpler if you factorise the numbers given under root sign and then you can make pairs of factors.
 
Example:
sqt (150*90*50*10)
= sqrt (3 * 5 * 10 * 3 * 3 * 10 * 5 * 10 * 10)
= sqrt (3 * 5 * 5 * 10 * 10 * 3 * 3 * 10 * 10)
= 5 * 10 * 3 * 10 sqrt (3)
= 1500 sqrt (3)
Answered by | 05 Aug, 2012, 10:19: PM

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