Question

(iv) (5- 2)(5+2)
how is this a rational number? Can someone plz explain it to me? ​

Answer 1

(5-2)(5+2)

=5²-2²

(Using (a+b)(a-b)=a²-b²)

=25-4

=21.

Answer 2

Answer:

(5-2)(5+2)

using (a-b)(a+b)=a²-b²

5²-2²

25-4

21

hence , it is rational number...