Question

An expression is shown below:

the square root of 18 plus the square root of 2

Which statement is true about the expression?

It is rational and equal to 4 times the square root of 2.
It is irrational and equal to 4 times the square root of 2.
It is rational and equal to 3 times the square root of 2.
It is irrational and equal to 3 times the square root of 2.

Answer 1

Might be easier if you write it out and simplify:
\[\large \sqrt{18}+\sqrt{2}\]
\[\large \sqrt{9*2}+\sqrt{2}\]
\[\large 3\sqrt{2}+\sqrt{2} =4\sqrt{2}\]