Question

Which expression is equivalent to (2−√−4)+(1+√−49)?
3−5i
3+5i
8+0i
−2+0i

Answer 1

Answer:

3 + 5i.

Step-by-step explanation:

(2−√−4)+(1+√−49)

√−4 = 2i  and

√−49 = 7i.

So   (2−√−4 + (1+√−49

= ( 2 - 2i) + (1 + 7i)

=  3  + -2i + 7i

= 3 + 5i.