Which expression is irrational?

a)√2

b) √4

c) √484

d)√529

The answer is A.
if you need proof go to google and ask "is 2 irrational?"

A)√2
Hope this helps. :)

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.