Quadratic equation which has no solution gives zero for the value of d.
d = b² - 4ac
0 = 3² +- 4(-1)c
-9 = +_ 4c
c = -9/-4 pr 9/-4
c = 9/4 or -9/4
In short, Your Answers would be Option C & E
Hope this helps!
Answer:
2.5
Step-by-step explanation:
( 9 ÷ 3 ) x 2 = 3 x 2 = 6 marbles ;
You literally need to apply the formula

where
is the mass and
is the speed