Question

if a = 1+√7 find minus 6 /a

Answer 1

ʜᴏᴩᴇ ɪᴛ ʜᴇʟᴩꜱ yᴏᴜ :)

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Answer 2

We are given a= 1 + |7
[(consider ( | ) means under root ]

we have to find -6/a

on putting the value of a

Then,
-6 / 1 +|7

On ratationalising

Therefore,
-6 (1-|7) / (1 + |7 )(1 - |7)

We know that [ a^2 - b^2 = ( a+ b)( a - b)]

then,
-6 ( 1 - |7 ) / 1^2 - |7^2

-6 ( 1 - |7 ) / 1 - 6

-6 ( 1 - |7 ) / 1 - 7

-6 ( 1 - |7 ) / 6

-( 1 - |7 )

-1 + |7 Answer