Ilf `b_1, b_2=2(c_1+c_2,)`
then at least one of the equation `x^2+b_1x+c_1=0a n dx^2+b_(2x)+c_2=0`
has
a. imaginary roots b.
real roots
c. purely imaginary roots d. none of these
A. real roots
B. purely imaginary roots
C. imaginary roots
D. none of these
