Why is 2√2 a rational number ?Watch
2 root 2 is not a rational number. A rational number can be written as a fraction.
If I had to write (11 + 5√5) / 4 in the form a + b√c where a, b and c are rational numbers, how would I do this ; surely
(11 / 4 ) + (5√5 / 4) is incorrect, because b wouldn't be rational in that scenario ?