11 points plz emergency

2 questions plz show steps

1. simplify the complex number expression and leave in standard form:

-5(1+2i)+3i(3-4i)

answer;

2. consider the imaginary numbers

(a) what makes the following an imaginary number?

square root -50

(b) simplify the expression below completely.

square root -50/ square root 5

(c) whats does i^22 equal

you so much i can't express how much it means to me : d