how to add and subtract complex numbers?

Question

solve the complex problem 3(-1--8i)+2(4+3i)

Answer 1

Addition in complex numbers (a+bi)(c+di) = (a+c)+(b+d)i

3(-1-8i)+2(4+3i)

= (-3-24i)+(8+6i)

a = -3, b = -24 ,c = 8, d = 6

= (-3+8)+(-24+6)i

= 5+(-18)i

= 5-18i