1 Answer

Lixas · Answer 1 · 2019-05-28T07:09:39+0000

A parabola is open up if a > 0.
The vertex formula:
y=a(x-h)^2+k

(h; k) - the coordinates of the vertex

$B.\ y=x^2+10x+24=x^2+2x\cdot5+24=x^2+2x\cdot5+5^2-5^2+24=(x+5)^2-1$
Therefore h = -5 < 0
Answer: B. y = x² + 10x + 24.

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