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If $a \;>\;0$ and $b^2-4ac=0,$ then the curve $y=ax^2+bx+c$

(a) cuts the x-axis

(b) touches the x-axis and lies below it

(c) ties entirely above the x-axis

(d) touches the x-axis and lies above it
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1 Answer

(d) touches the x-axis and lies above it
answered Nov 7, 2013 by pady_1
 
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