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If graph of quadratic polynomial ax2 + bx + c cuts positive direction of y-axis, then what is the sign of c?
Positive
If quadratic polynomial ax2 + bx + c cuts positive direction of y-axis, then it means that the value of y is positive when x = 0 [∵ at y-axis, x = 0]
Now
y = c at x = 0 and y is positive.
So, c is positive.