Question

if a equals to 2 , b equal to 1 then a2-b equals​

Answer 1

✮ Question : If a = 2 , b = 1 then a² - b equals​

✮ Given  : a = 2 , b = 1

✮ To Find : a² - b

✮ Answer : 3

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✮ Explanation :

a² - b  

Substitute the value of a

⇒ (2)² - b  

⇒ 4 - b  

Substitute the value of b

⇒ 4 - 1

⇒ 3

Answer 2

Answer:

The value of

1+b−ia

1+b+ia

=

(1+b−ia)(1+b+ia)

(1+b+ia)

2

=

(1+b)

2

+a

2

1+b

2

−a

2

+2iab+2b+2ia

=

1+b

2

+2b+a

2

1+2b+b

2

−a

2

+i(2ab+2a)

=

2+2b

a

2

+b

2

+2b+b

2

−a

2

+i2a(1+b)

=

2(1+b)

2b

2

+2b+i2a(1+b)

=

2(1+b)

2b(1+b)

+i

1+b

a(1+b)

=b+ia