Math, asked by pacrat5858, 1 year ago

a=6-√35 find the value of a2+1/a2 how last two steps r done I can't understand

Answers

Answered by littyissacpe8b60
0

a² = (6 - √35)² = 36 - 12√35 + 35 = 71 - 12√35

1/a²  =    71 + 12√35    =           71  + 12√35    = 71 + 12√35

           (71)² - (12√35)²              5041 - 5040


a² + 1/a²   = 71 - 12√35 + 71 + 12√35 = 142

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