Determine the value(s) of k such that: 5. x2 + kx+7=0 a) has exactly 1 real root b) has 2 imaginary roots c) has 2 real roots 6. 2x3 + 6x+k=0 a) has exactly 1 real root b) has 2 imaginary roots c) has 2 real roots facturer in Phoenix, Arizona is P(x) = --(x-13)2+21