Question

2.4.19Add.(6 - i) + (-7 +81)The answer is(Simplify your answer. Type your answer in the

Answer 1

we have

(6 - i) + (-7 +8i)

Combine like terms

(6-7)+(-i+8i)

-1+7i

we have

(6-i )+(-9+4i)

Combine like terms

(6-9)+(-i+4i)

-3+3i

we have

(3+4i )-(6-4i)

eliminate parenthesis

3+4i-6+4i

combine like terms

9i(5i)=45i^2

remember that

i^2=-1

so

45i^2=45(-1)=-45