Question 670688
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
 y = ax^2 + bx + c  || (0,4) &#8658; c = 4
    4a - 2b  = -22  (-18-c)   ||Mult 1st Eq by 2 and Add to 2nd
   <u>16a + 4b  = 20</u>   (24-c)
     24a= -24
      a = -1   and b =  9 {{{-4 +22 = 2b}}}
y = -x^2 +9x + 4