Given the function y = ax & # 178; + BX + C, if AC < 0, then the number of zeros of function f (x) is

The solution is ax & # 178; + BX + C = 0
Δ = B ^ 2-4ac = B ^ 2 + (- 4ac)
From AC < 0
Knowledge Δ > 0
So the function y = ax & # 178; + BX + C,
There are two intersections between the x-axis and the image of
so
The number of zeros of function f (x) is 2

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