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32 votes
32 votes
How do i find the vertex of y= -4x^2-16x+1 ?

User Bastes
by
2.6k points

1 Answer

10 votes
10 votes

Answer:

(-2, 17)

Explanation:

the first step you can do to find the vertex is to find the axis of symmetry

the equation for that is -b/2a

-(16) / 2(-4)

-16 / 8 = -2

the axis of symmetry is x =-2 so you plug in -2 to the equation

-4(-2)^2 - 16(-2) + 1

-4(4) + 32 + 1

-16 + 33

17

the vertex is (-2, 17)

User Joshua Spence
by
3.1k points