If z=4-3i write z squared + 17 in the form a+bi, a, b e r

Ineed with number 17 i don’t get it at alll

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Which expression converts 45 degree to radians