Question

(2-I)(3+5i) multiple

Answer 1

ii-7i

Step-by-step explanation:

These can be multiplied in a manner similar to expanding brackets:

(

2

+

i

)

(

3

−

5

i

)

=

6

+

3

i

−

10

i

−

5

i

2

Remember that

i

=

√

−

1

so

i

2

=

−

1

This will in turn allow us to gather the like terms like so:

6

+

5

+

3

i

−

10

i

=

11

−

7

i