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rajatvmittal Really wants to Beat The GMAT! Default Avatar
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Constants Post Tue Mar 13, 2012 7:51 am
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  • Lap #[LAPCOUNT] ([LAPTIME])
    if b,c,d are constants and x2+bx+c=(x+d)2 (2 is square)for all values of x, what is value of c?
    a) d=3
    b) b=6

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    killer1387 GMAT Destroyer! Default Avatar
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    Post Tue Mar 13, 2012 8:35 am
    rajatvmittal wrote:
    if b,c,d are constants and x2+bx+c=(x+d)2 (2 is square)for all values of x, what is value of c?
    a) d=3
    b) b=6
    x2+bx+c=(x+d)^2 for all x
    hence
    b=2d and c=d^2
    1) sufficient
    2) sufficient

    hence D

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