The graph of touches the -axis at exactly one point

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

The graph of y=ax2+bx+cy=ax^2+bx+c touches the xx-axis at exactly one point. Which condition on its discriminant DD is true? (a) D<0D<0 (b) D=0D=0 (c) D>0D>0 (d) D≤0D\le 0

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