Answers

  • qais
  • Content Quality
2016-04-30T11:31:07+05:30
A = (√3-√2)/(√3+√2)
  = (√3-√2)/(√3+√2)× (√3-√2)/(√3-√2) [ rationalizing it]
  =(
√3 -√2)²/1 = (√3 -√2)² = 5- 2√6
b= 
(√3+√2)/(√3-√2)×(√3+√2)/(√3+√2) [ rationalizing it]
 = 
(√3+√2)²/1 =(√3+√2)² = 5+2√6
now, a²+b² - 5ab 
= (5-2√6)² + (5+2√6)² - 5(5-2√6)(5+2√6)
=25 +24 -20√6 +25 +24 + 20√6 - 5(25-24)
=98 -5 = 93
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