Simplify the expression. Type the answer in the standard form of complex numbers . (2 + 7i) − (4 − 8i)

Answer 1

Combine like terms, real with real, imaginary with imaginary.

(2+7i)-(4-8i)

2 and 4 are real

2-4= -2

7i and -8i are imaginary

7i-(-8i)=15i

Standard form is real then imaginary

-2+15i

Answer 2

combine k=like terms gives you 2-4=-2 and 7i-(-8i)=15i

So we have - 2 +15i