Find the values of the expressions (1 + i)6 + (1 – i)3

Asked by Sakshi | 1 year ago |  54

1 Answer

Solution :-

(1 + i)6 + (1 – i)3

Let us simplify we get,

(1 + i)6 + (1 – i)3 = {(1 + i)2 }3 + (1 – i)2 (1 – i)

= {1 + i2 + 2i}3 + (1 + i2 – 2i)(1 – i)

= {1 – 1 + 2i}3 + (1 – 1 – 2i)(1 – i)

= (2i)3 + (– 2i)(1 – i)

= 8i3 + (– 2i) + 2i2

= – 8i – 2i – 2 [since i3 = – i, i2 = – 1]

= – 10 i – 2

= – 2(1 + 5i)

= – 2 – 10i

(1 + i)6 + (1 – i)3 = – 2 – 10i

Answered by Aaryan | 1 year ago

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