Question

Please explain with instructions.

Answer 1

Answer:

first first you take the LCM after taking the LCM you convert into simplest form after converting into simplest form you make the denominator same after making the denominator same you do do the addition after doing the addition you will get your answer

Answer 2

hi dear

pic is not clear .sorry

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$\sqrt{4}$= 2 where 2 is a rational number . Here n is perfect square the $\sqrt{n}$ is rational number

$\sqrt{5}$ = 2.236.. is not rational number But it is irrational number.here n is not a perfect square the $\sqrt{n}$ is irrational number

So $\sqrt{n}$ is not irrational number if n is perfect square.