Question

(7+root5)× (7-root5) tell is it rational or irrational ​

Answer 1

Answer:

yes it is a rational number

Step-by-step explanation:

by using (a²-b²)=(a-b)(a+b)

so (7+√5)(7-√5)

(7²- (√5)²)

(49-5)

= 44

Answer 2

Answer:

rational number

Step-by-step explanation:

(7+√5)×(7-√5)

=(7^2-√5^2)

=49-5=44