Answer:
discriminant = 120
2 real roots ( or 2 x intercepts)
Explanation:
f(x) = -7x^2 +8x+2
The discriminant is
b^2-4ac
Where ax^2 +bx+c
so a = -7 b = 8 and c =2
(8)^2 -4(-7) *(2)
64 +56
120
If the discriminant is >0 we have 2 real roots
If the discriminant =0 we have 1 real root
If the discriminant <0 we have 2 complex root ( or no real roots)