Question

pls help me solve this​

Answer 1

Answer:

all Or others and do u want stepwise

Answer 2

Step-by-step explanation:

1. a) (2+√3) + (2-√3)

= 4

= it is a rational no.

b) ( √3+√2) (√3-√2)

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

= 3 - 2

= 1

= it is a rational no.

c) 2√7

= it is an irrational no.

d) 3π

= it is an irrational no.

2. a) (√7-√2)^2

= (√5)^2

= 5

b) (√2+1) (√2-1)

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

= (√2)^2 - (1 )^2

= 2-1

= 1

3. a) 1/√5

= Multiply the numerator and the denominator by √5 , we get

√5/5

I hope it will help you