Question

what no. do we obtain on rationalising the denominator of 1/√7+2
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Answer 1

Step-by-step explanation:

i hope it helps you

it's correct

Answer 2

Answer:

(√7-2)/3

Step-by-step explanation:

Let x=1/(√7+2)

Multiplying up and down by √7-2

x=√7-2/(√7-2)(√7+2)

=(√7-2) / { (√7)²-2²}

=(√7-2)/(7-4)

=(√7-2)/3