The coefficients of a, b, and c in the following quadratic equation are a = 4, b = 4, and c = -1: 4x2 + 4x + 1 = 0

if c is -1 the equation should be

4x² + 4x -1 = 0

not plus 1

I assume you want the coordinates of the zeros.

if c is indeed -1, they are at (-1.207 , 0) and (0.207 , 0)

if c is +1, as in the equation the only zero point is at (-0.5 , 0)

see screenshot for illustration

answer:

c. the third graph