4. Write three quadratic polynomials that have no zeroes. THINK & Discuss Observe the curves in the graph given below. They represent y =3*,y=1 and y 22. Try to plot some more graphs for y = x2+1, y = 2x+1. Comment on your observations
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In graphs of quadratic functions, the sign on the coefficient a affects whether the graph opens up or down. If a < 0 , the graph makes a frown (opens down) and if a > 0 then the graph makes a smile (opens up).
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