Question 1175419
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Hi

Y = 2x^2 - 13x + 20   | Concave Upward   y = (2x-5)(x-4)
  = 2(x-13/2)^2 - 169/8 + 20   |Completing the Square
  = 2(x-13/2)^2 - 9/8          |vertex Form {{{y=a(x-h)^2 +k}}} 
  V(13/2, -1.125)
x-intercepts P(2.5,0)  and P(4,0) 
No y-intercept
{{{drawing(300,300,    -10,10,-10,10,  
 grid(1),
circle(13/4, -1.125,0.3),
circle(4,0,0.3),
circle(5/2,0,0.3),
graph( 300, 300, -10,10,-10,10,0, 2x^2 - 13x + 20))}}}
Recommend the FREE graph software  https://www.padowan.dk/download/ 
Wish You the Best in your Studies.
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