My Math Forum Discriminant for intersection parabola and line

 Algebra Pre-Algebra and Basic Algebra Math Forum

 October 31st, 2011, 12:15 PM #1 Newbie   Joined: Sep 2011 Posts: 15 Thanks: 0 Discriminant for intersection parabola and line Hello everybody. I can't figure out if something's wrong with the solution to this question or if it's just me. The discriminant is just $b^2 - 4ac= (k + 2)^2 - 4 = k^2 + 4k = k(k + 4)$ So want $k(k + 4) \geq 0$ so $k \geq 0 and (k + 4) \geq 0$ OR $k \leq 0 AND (k + 4) \leq 0$ so $k \geq 0 and k \geq -4$ OR $k \leq 0 AND k \leq -4$ Thanks everybody.

 Tags discriminant, intersection, line, parabola

### discriminant intersection

Click on a term to search for related topics.
 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post pionixstar90 Algebra 4 February 21st, 2013 08:19 PM math12345 Algebra 3 April 3rd, 2011 10:54 AM organismal Algebra 1 September 9th, 2009 09:06 PM FoScho Algebra 1 November 3rd, 2008 10:00 AM gdsentropy Calculus 2 October 23rd, 2008 02:47 AM

 Contact - Home - Forums - Cryptocurrency Forum - Top