Question

check whether ?98 is a rational number or not

Answer 1

Hello,

98= 49 * 2 = 7^2*2, so neither square root of 98 is rational, it’s the product of 7 and the square root of 2, that is not rational.

Instead, of course, the Square Root of (98+2) is the Square Root of (100), that is 10, so it’s rational.

Regards,