Recent content by undefinable

^ Right, 0 and 4, lol I'm getting the numbers but I'm not getting the greater than and less than signs. Referring to 9k^{2}-36k>0=>k^{2}-4k>0=> k(k-4)>0 I got that but then what I concluded from that is k>0 and K>4. HOw can I end up with K<0 ?

Still don't understand. For A, by using b^2-4ac= 0 I got the answer that k=0 (which is correct) For B, I still don't understand how to achieve this answer k < 0 or k >4. How can I work with my equations to conclude that the values of k must be k< 0 or k >4 for y=9x^2 + 3kx + k to intersect two...

Homework Statement Find k such that the graph of y=9x^2 + 3kx + k A) intersects the x-axis in one point only B) intersects the x-axis in two points C) does not intersect the x-axis Homework Equations D= b^2 − 4ac y= ax^2+bx+c quadratic equation The Attempt at a Solution I got A...

Homework Statement Alvin races Ophelia to Physics class. Alvin has a headstar of 13m and travels at a constant speed of 7m/s. Phelia is initially traveling at 1.2m/s but then begins to accelerate at 1.5m/s2 until she reaches the physics classroom 100m away from her. Who wins the race? when...