(i) 3(7 + i7) +i(7 + i7)
(ii) (1 – i) – (-1 + i6)
(iii) 
(i) 3(7 + i7) +i(7 + i7)
(ii) (1 – i) – (-1 + i6)
(iii)
(ii) (1 – i) – (-1 + i6)
(iii)
(i) 3(7 + i7) +i(7 + i7)
= 21 + 21i + 7i + 7i2
= 21 + 28i +7(-1)
= 21 + 28i – 7
= 14 + 28i
(ii) (1 – i) – (-1 + i6)
= 1 – i + 1 – i6
= 2 – i7
= 2 +(-7)i
(iii)
= 
= 
= 
= 
AI is thinking…
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
(ii) i9 + i19 (iii) i-39
(ii) (1 – i)4 (iii) 
(iv) 
(iii) –i
