Question

6. Examine whether the following numbers are rational or irrational(i)( 5 - root 5) (5+ root 5 )​

Answer 1

Answer:

Step-by-step explanation:

(5-√5)(5+√5)

=(5)^2 - (√5)^2. [ a^2 - b^2=(a+b)(a-b)]

=25 -5

=20 = 20/1

Since the number is of the form p/q where p and q are integers and q not equal zero hence it is rational.