What is the the vertex of y=x2+7x+12?

1 Answer
Jan 29, 2016

(72,14)

Explanation:

Re-express in vertex form by completing the square:

y=x2+7x+12

=x2+7x+(72)2(72)2+12

=(x+72)2494+484

=1(x(72))2+(14)

The equation:

y=1(x(72))2+(14)

is in vertex form:

y=a(xh)2+k

with multiplier a=1 and vertex (h,k)=(72,14)