Question

Find a and b if : (18 marks). 1. (a+b) (2+i) = (b+1) + (10+2a) i ​

Answer 1

Answer:

a= -3 b=7

Step-by-step explanation:

2a+ai+2b+bi = (b+1) + (10+2a)i

2(a+b) + (a+b) i = (b+1) + (10+2a)i

comparing real and imaginary part

2(a+b)= b+1

and

a+b= 10+2a

on solving

a= -3 b=7

Answer 2

Answer:

a=-3

b=7

Step-by-step explanation:

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