Setting this expression = to 0 and then using the quadratic formula,
31 plus or minus sqrt( 961-4(10)(15) ) x = ------------------------------------------------------- 20 31 plus or minus sqrt(361) = -------------------------------------- 20 31 plus or minus 19 = ----------------------------- 20 40 or 12 = ----------------- = 2 or 6/10 or 2, 3/5 20
The graph is that of a parabola and it opens up. Zeros are x=2 and x=3/5. 31 Axis of symmetry is x = ---------- 20
What else did you want to know, if anything? Next time, plese be sure to share all of the instructions.
