Question

4.What should be added to - to get ? (a) (b) (c) (d)

Answer 1

Answer:

hy good evening

hope you fine

Answer 2

Answer:

2ab

Step-by-step explanation:

Reqd exp = 1−[

a−b

a

+

a+b

b

]

⇒1−[

a

2

−b

2

a(a+b)+b(a−b)

]

⇒1−[

a

2

−b

2

a

2

+ab+ab−b

2

]

⇒

a

2

−b

2

(a

2

−b

2

)−(a

2

+2ab−b

2

)

⇒

a

2

−b

2

−2ab

=

b

2

−a

2

2ab