Question

(√2+1) (√2-1)
without using identity
​

Answer 1

Answer:

2-1

1

hope that helps

pla are follow

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

Answer 2

Answer:

Correct option is

A

3

7

+2

We use the identity (a+

b

)(a−

b

)=a

2

−b.

Multiply and divide

7

−2

1

by

7

+2 to get

7

−2

1

×

7

+2

7

+2

=

7−4

7

+2

=

3

7

+2

Hence, option A.

Step-by-step explanation:

ok