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secondary 3 | A Maths
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Date Posted: 4 years ago
Views: 194
A and C must be negative.
It’s not sufficient to say that both a and c are negative. What happens if a = -1 and c = -1?
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When a curve is always negative, the graph only resides below the x-axis all the time. This implies that the curve must be sad face. Smiley face curves cannot ever be “always below the x-axis” because it will always go up at both ends.
Also, the fact that the graph only resides below the x-axis means that the curve will never ever cut the x-axis, so the equation will not have any real roots at all.
Also, the fact that the graph only resides below the x-axis means that the curve will never ever cut the x-axis, so the equation will not have any real roots at all.
Date Posted:
4 years ago
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