Rationalize the denominator 5-√6/5+√6
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Answer:
31-10√6/19
Step-by-step explanation:
5-√6/5+√6
= 5-√6/5+√6 * 5-√6/5-√6.
5-√6 * 5-√6 = (5-√6)^2. [(a-b)^2 = a^2 -2ab + b^2]
5-√6 * 5+√6. [(a-b) (a+b) = a^2 - b^2]
= (5-√6)^2/(5-√6)(5+√6)
(5-√6)^2
= 5^2 - 2*5*√6 + (√6)^2
= 25 - 10√6 + 6
= 31-10√6
(5-√6)(5+√6)
= (5)^2 - (√6)^2
= 25 - 6
= 19
So,
5-√6/5+√6
= 31-10√6/19
Hope it helps you.....
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