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Question
If the graph of quadratic polynomial ax2 + bx + c cuts negative direction of y-axis, then what is the sign of c?
Solution
Since graph of quadratic polynomial `f(x)= ax^2 + bx + c`cuts negative direction of y−axis
So put x=0 to find the intersection point on y-axis
` y = 0 + 0 + c +c `
So the point is `(0 , c)`
Now it is given that the quadratic polynomial cuts negative direction of y
So `c < 0`
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