Question

answer my question fast!!!​

Answer 1

Heya!.., here is your answer....

(i)

$(2 - \sqrt{5})$

is an irrational no.

(ii)

$(3 + \sqrt{23}) - \sqrt{23} \\ \\ \: \: = 3 + \sqrt{23} - \sqrt{23} \\ \\ \: \: = 3$

Therefore it is rational.

(iii)

$((2 \sqrt{7}) \div (7 \sqrt{7})) \\ \\ \: \: = (2 \div 7)$

Therefore it is rational.

(iv)

$(1 \div \sqrt{2})$

is an irrational no.

(v)

$2\pi$

is an irrational no.

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Answer 2

hey buddy here is your answer

please mark brainlist

Step-by-step explanation:

i)2-root 5

=2 root 5 that is irrational

ii)3+root23 -root 23

=root 23 -root 23 is 0

so result is 3 that is rational as it is in the form of p/q

iii)2root7/2root7

=root 7 is cancelled by root 7

so the result is2by 2 that is 1 and rational as it is in the form of p/q

iv)1 upon root 2

is irrational

v)2pi

is irrational as pi is irrational please follow