English, asked by muskanahirwar26, 4 months ago

rationalise the denominators 1/root 7 -2

Answers

Answered by ushnah0212ghayas

Answer:

1/√7-2*√7+2/√7+2

√7+2/√7^2-2^2

this is because of formula that a^2-b^2=(a+b)(a-b)

√7+2/49-4

√7+2/45

that's it

Answered by JasynAlexanderIII

Answer:

1 sqr(5)

Explanation:

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