Answer:
Option B is correct, i.e. 1.
Step-by-step explanation:
The Discriminant of quadratic equation is given as follows:-
D = b² -4ac
When D is ZERO and the quadratic formula is simplified as follows:-
x = ( -b ± √(b² -4ac) )/2a
x = ( -b ± √D )/2a
x = ( -b ± √(0) )/2a
x = ( -b ± 0 )/2a
x = -b/2a
So x has one real root with multiplicity 2.
Hence, option B is correct, i.e. 1.
