Ineed some with this math problem asap

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?