Question 442774
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi
Graph the function
Note: vertex form of a parabola, {{{y=a(x-h)^2 +k}}} where(h,k) is the vertex
f(x)= -2x^2 + 4x + 1  |y-intercept is (0,1)
f(x)= -2[(x-1)^2 -1] + 1
f(x)= -2(x-1)^2 +2 + 1
f(x)= -2(x-1)^2 + 3 | V(1,3), Parabola opens downward a = -2 < 0
x-intercepts: x = 1 ± sqrt(3/2) x = 1 ± 1.2247
{{{drawing(300,300,   -6, 6, -6, 6,  blue(line(1,6,1,-6))  , grid(1),
circle(1, 3,0.3),
circle(0, 1,0.3),
circle(2.2247, 0,0.3),
circle(-.2247, 0,0.3),
graph( 300, 300, -6, 6, -6, 6,0,-2x^2 + 4x + 1 ))}}}



ewatrrr@aol.com
private/pay tutoring Inquiries only, please.