Question

The value of (5 + √4) (5 - √4 ) is ​

Answer 1

Answer:

a^2 -b^2=(a+b)(a-b)

here a=5 and b=4^(1/2)

from above you get your ans

Answer 2

Step-by-step explanation:

(5 + root 4) (5 - root4)

= 5^2 - root4^2 [*(a+b)(a-b)=a^2 - b^2]

=25 - 4

=21