(3+5i) (3-i√5) express in a+ib form.
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We can get simpler form by Simplification .
(3+5i) (3-i√5)
= 3(3-i√5) +5i(3-i√5)
=9-3i√5+15i-i²(5√5)
We know i²=-1
=9-3√5i +15i -(-1)(5√5)
=(9+5√5)+ i (15-3√5) is in the form a+ib where a=9+5√5 , b =15-3√5
Hope helped !
(3+5i) (3-i√5)
= 3(3-i√5) +5i(3-i√5)
=9-3i√5+15i-i²(5√5)
We know i²=-1
=9-3√5i +15i -(-1)(5√5)
=(9+5√5)+ i (15-3√5) is in the form a+ib where a=9+5√5 , b =15-3√5
Hope helped !
devraj7:
thank you so much
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