Question

7/5root of4- 4root of 5 rationalise the denominater ​

Answer 1

7/5√4-4√5

=7(5√4+4√5)/(5√4-4√5)(5√4+4√5)

=35√4+28√4/100-80

Using

• a²-b²=(a+b)(a-b)

==35√4+28√4/20.

Answer 2

Step-by-step explanation:

5 5 is a rational hence the denominator as as it is become rational