Question

if x and y are rational number then show that x^2 -y^2 is also a rational number​

Answer 1

Answer:

Step-by-step explanation:

AS we know that the difference or sum of a rational number is always a rational no and the product of a rational no is also always a ration no

HENCE

x^2-y^2 = (x+y)(x-y)

(x+y) and (x-y) would be a rational number so their product would also be

Due to which we can state the x^2-y^2 is a rational number