Identify the vertex for the graph of y = 4x2 + 16x − 1.

Question

anonymous · Answer

You need to factorize the function, do you know how to do that?

anonymous · Answer

complete the square

anonymous · Answer

And then you can take the midpoint of the two zeros to be the x coordinate of the vertex

anonymous · Answer

you can't to that in every case but here it can be done

campbell_st · Answer

the vertex lines on the line of symmetry

which can be found using 

$$x = \frac{-b}{2a}$$

a = 4 and b = 16

then substitute this value onto the original equation to find the y - co ordinate of the vertex.

anonymous · Answer

the vertex lines on the line of symmetry

which can be found using 

x=−b 2a   

a = 4 and b = 16

then substitute this value onto the original equation to find the y - co ordinate of the vertex.  a few moments ago
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anonymous · Answer

thanksss(:

campbell_st · Answer

lol @george132 its just a straight copy and paste of my answer.... to funny...

anonymous · Answer

lol @george132

anonymous · Answer

lol thats truee, that why i gave you best response :p

anonymous · Answer

even copied report abuse

anonymous · Answer

why does @Rimplestorck  say we can not always complete the square ,i believe we can

anonymous · Answer

haha thats super funny

anonymous · Answer

@Jonask i didn't mean completing the square but rather my method, which was finding the zeros and then taking x to be the middle point

anonymous · Answer

ok sorry