Question

√7-1/√7+1 - √7+1/ √7-1 = a+b√7​

Answer 1

Answer:

Step-by-step explanation:

sqrt(7)-1/sqrt(7)+1

ratinalise the denominator sqrt(7)-1

=sqrt(7)-1)^2/6

=7+1-2sqrt(7)/6

=8-2sqrt(7)/6

sqrt(7)+1/sqrt(7)-1

ratinqlise the denominator sqrt(7)+1

sqrt(7)+1)^2/6

=7+1+2sart(7)/6

=8+2sqrt(7)/6

now (8-2sqrt(7)/6)-(8+2sqrt(7)/6)=-4sqrt(7)/6=a+bsqrt(7)

a=0

b=-4/6=-2/3

Answer 2

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