Idon’t understand question 3 that well. can anybody me?

Which zero pair could be added to the function f(x) = x2 + 12x + 6 so that the function can be written in vertex form? o 3, -3o 6,629,-936, 36

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid