Rational the denominaror 2/√7-√5
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Answer:
= [5 * (√7 - √2)] / [(√7 + √2) * (√7 - √2)]
= [5 * (√7 - √2)] / [(√7)² - (√2)²]
= [5 * (√7 - √2)] / (7 - 2)
= [5 * (√7 - √2)] / (5)
= [5 * (√7 - √2)] / 5
= (√7 - √2) * (5 / 5)
= (√7 - √2) * (1)
= (√7 - √2)
= √7 - √2
The final answer is: √7 - √2
Step-by-step explanation:
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Answered by
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√7+√5
Step-by-step explanation:
2/√7-√5
= 2/√7-√5 × √7+√5/√7+√5
= 2(√7+√5)/(√7-√5)(√7+√5)
{(√a+√b)(√a-√b)}=a-b
= √14+√10/7-5
= √14+√10/2
=√14/2+√10/2
=√7+√5
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