Recent content by Menos

  1. M

    Finding Tangent Lines for Parabolas: A Mathematical Approach

    Ok, thanks anyway then. I guess I'll look for that formula, as I took a look at derivatives, and I doubt I could learn that without having a foundation in Calculus let alone Trig or Euclidian Geometry.
  2. M

    Finding Tangent Lines for Parabolas: A Mathematical Approach

    Nope, and that's where I'm stuck at the moment. I see the (ax+b)(cx+d)=y, but I've got nothing after that... I tried expanding it out which gives y=acx^2+adx+bcx+bd and that yields nothing that I can see.
  3. M

    Finding Tangent Lines for Parabolas: A Mathematical Approach

    It's for my Honors Algebra II class. Not everyone has to do it, my teacher and I are working together on upper level math like this. I can generally get the stuff we discuss, but some of it goes right over my head, as I'm only in 9th grade. But thanks a lot for the help on this one, it's...
  4. M

    Finding Tangent Lines for Parabolas: A Mathematical Approach

    Ok, I need to find 2 lines that when multiplied (y=x*y=x yields y=x^2) create a parabola in which those two lines are tangent to it. My problem is that I have no idea where to start. I think that the two lines have to have opposite slopes, or at least one slope must be positive and one must...
  5. M

    Why does multiplying the positive x values give the y-intercept on a parabola?

    Interesting feature of this graph. Consider 2 points on the parabola, I'll take (-2,4) and (4,16). By multipling the positive x values (2*4=8), you can get the y-intercept of the line from (-2,4) to (4,16). Proof: The line including (-2,4) and (4, 16) is written as y=2x+8. Thus, the...
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