(5 - 3√-20) + (3 - 2√-45)
= (5 - i*6√5) + (3 - i*6√5)
= 8 - i*12√5
= (5 - i*6√5) + (3 - i*6√5)
= 8 - i*12√5
-
1st u need to make 2 root have be the same .
which they are root of 180 so
5-3 root-20+3-3 root20
= 8-3 root -40
=8- 3iroot 40
which they are root of 180 so
5-3 root-20+3-3 root20
= 8-3 root -40
=8- 3iroot 40