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\[\sqrt{64}+\sqrt{5}\]

\[\sqrt{64}+\sqrt{4}\]

Question: What does the square root of 64 equal?

8 ?

Yes. What is square root of 4

2 ?

So that means that B is rational then right?

The numbers 8 and 2 are rational because they can be expressed as fractions: 8/1 and 2/1.
Irrational numbers cannot.

Question: Is the square root of 5 a rational number?

Not at all no.

So, what is the final answer to the question

So that means the A is irrational, but B is rational, henceforth it is D right?

Correct: A is irrational, but B is rational.

Question?

Thank you so much, you are absolutely awesome, I wish I had your smarts. Thank you very much!

You are welcome.