Question

The difference of two surds example

Answer 1

Answer:

The sum and difference of two simple quadratic surds are said to be conjugate surds to each other. ... For example √x = a and √y = b, a and b are two quadratic surds, if (a + b) or (√x+√y) is multiplied with (a - b) or (√x−√y), the result will (√x)2 - (√y)2 or (x - y) which is rational number.