Let 3x^2 + 4x + c = 0/ What value of c with give us exactly one solution for x?
I am not sure how exactly to complete these kind of problems.
Thanks in advance.
If we have only one solution ...the discriminant will = 0
So a = 3 , b = 4 and c = ???
The discriminant is given by :
b^2 - 4ac so.... plugging in, we have that
4^2 - 4(3)(c) = 0
16 - 12c = 0
16 = 12c divide both sides by 12
16/12 = c = 4/3
Here's the graph that confirms one solution :