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# Does the line represented by ax^2+bx+c intersect the x-axis?

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Director
Joined: 17 Oct 2005
Posts: 924

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Does the line represented by ax^2+bx+c intersect the x-axis? [#permalink]

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21 Feb 2006, 17:11
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Does the line represented by ax^2+bx+c intersect the x-axis?

I) a>0
II) c<0

Kudos [?]: 267 [0], given: 0

Manager
Joined: 15 Aug 2005
Posts: 132

Kudos [?]: 27 [0], given: 0

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21 Feb 2006, 18:50
joemama142000 wrote:
Does the line represented by ax^2+bx+c intersect the x-axis?

I) a>0
II) c<0

C

the equation will intersect x-axis at ax^2+bx+c=0
so we basically need to find out if this eqn has real roots
or is b^2 - 4ac > 0 or not

i] insuff
ii] insuff

i] & ii] - suff

Kudos [?]: 27 [0], given: 0

Senior Manager
Joined: 11 Jan 2006
Posts: 266

Kudos [?]: 4 [0], given: 0

Location: Chennai,India

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21 Feb 2006, 22:13
believe2 wrote:
joemama142000 wrote:
Does the line represented by ax^2+bx+c intersect the x-axis?

I) a>0
II) c<0

C

the equation will intersect x-axis at ax^2+bx+c=0
so we basically need to find out if this eqn has real roots
or is b^2 - 4ac > 0 or not

i] insuff
ii] insuff

i] & ii] - suff

ok , get it sir.. thnks
_________________

vazlkaiye porkalam vazltuthan parkanum.... porkalam maralam porkalthan maruma

Kudos [?]: 4 [0], given: 0

Re: parabola   [#permalink] 21 Feb 2006, 22:13
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# Does the line represented by ax^2+bx+c intersect the x-axis?

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