Answer:
2
Explanation:
Find the discriminant:
D = b² − 4ac
If the discriminant is positive (D > 0), there are 2 real zeros.
If the discriminant is zero (D = 0), there is 1 real zero.
If the discriminant is negative (D < 0), there are no real zeros.
In this case, a = -5, b = 6, and c = 4.
D = (6)² − 4(-5)(4)
D = 36 + 80
D = 116
D > 0
There are 2 real zeros.