Question

iii) (a+b) (2+i)= b + 1 + (10+ 2a)i​

Answer 1

Answer:

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Step-by-step explanation:

2a + (10 + a) = 1

3a + 10 = 1

3a = -9

a = -3

b = 10 + a

b = 10 - 3

b = 7

(7-3)(2+i) = 7 + 1 + (10 + 2(-3))i

4(2 + i) = 8 + 4i

8 + 4i = 8 + 4i.