Question

find the value of in (2 + 3 i ) rah (2 - 3 i) solve by step wise​

Answer 1

Step-by-step explanation:

(a+b) (a-b)=a²- b²

here a= 2

b= 3i

(2 + 3 i )(2 - 3 i)

= (2)² - (3i)²

= 4 - 9i²

we know that, i²= -1

therefore,

(2 + 3 i )(2 - 3 i) = 4+9

= 13

Answer 2

Answer:

2^2- (3i)^2

4 - (3*-1)^2

4--3^2

4+9

=13

hint:i^2=-1