Question

if x=ab and y= a+b, where a= 5+√5, b=5-√5 then find whether x and y are rational or irrational.​

Answer 1

Answer:

X is Rational number

Y is Rational number

Step-by-step explanation:

X = ab = (5+√5)×(5-√5)

= 5 ² - (√5) ²

= 25 - 5. = 20 is Rational number

Y = a + b = ( 5 + √5 ) + ( 5 - √5 )

= 5 + 5 = 10 is a Rational number