Which one of the following quadratic equations represents a parabola that touches the…

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

Problem

Which one of the following quadratic equations represents a parabola that touches the xx-axis exactly once? (a) x2+4x+1=0x^{2}+4x+1=0 (b) x2−6x+8=0x^{2}-6x+8=0 (c) x2−6x+9=0x^{2}-6x+9=0 (d) 3x2+2x+5=03x^{2}+2x+5=0

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