Question 404676
Evaluate the expression (-4 - 3 i)+(8 - 7 i) and write the result in the form a+ b i. 

Sol'n:
(a1 + b1i)+ (a2 + b2i) = (a1+a2)+(b1+b2)i
thus,
=(-4+8)+(-3-7)i
=4-10i ----answer