If a = 8 + 3√7 and b = 1 / a , what will be the value of 2+ 2.

Question

If a = 8 + 3√7 and b = 1 / a , what will be the value of 2+ 2.

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Adalyn 1 month 2021-08-17T22:20:29+00:00 1 Answer 0 views 0

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    2021-08-17T22:22:28+00:00

    Step-by-step explanation:

    A=8+3√7 b=1/a =1/8+3√7

    = 8-3√7/1 (on rationalising)

    now a= 8+3√7 b=8-3√7 b= 8-3√7

    therefore a2+b2 =( 8+3√7 )2 + ( 8-3√7 )2

    =( 64 + 63 + 48 √7 ) + ( 64+63-48√7 )

    a2+b2= 254

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