[tex]y=ax^2+bx+c[/tex]
A parabola is open up if a > 0.
The vertex formula: [tex]y=a(x-h)^2+k[/tex]
(h; k) - the coordinates of the vertex
[tex]B.\ y=x^2+10x+24=x^2+2x\cdot5+24=x^2+2x\cdot5+5^2-5^2+24=(x+5)^2-1[/tex]
Therefore h = -5 < 0
Answer: B. y = x² + 10x + 24.
