Question

what is the vertex of

(-4x^2)-x+5

Answer 1

Do you mean Roots??????

Answer 2

nope vertex.. i got -1/8 for x i just need why now

Answer 3

Use -b/2a.

Answer 4

i did thats how i got -1/8

Answer 5

That would be your x value. Now plug that back in to get your y value.

Answer 6

So you want to know why we apply -b/2a and what is its significance?????

Answer 7

Okay i plugged it back in and i ended up getting 5.062 but i think it wants it in fraction form

Answer 8

Fraction form would be 81/16

Answer 9

*it refers to Wiley Plus

Answer 10

\[(-4x^2)-x+5\]
\[-4(-\frac{1}{8})^2-(-\frac{1}{8})+5\]

Answer 11

ok great thanks zordoloom

Answer 12

yep.

Answer 13

\[-\frac{1}{16}+\frac{1}{8}+5\]
\[\frac{1}{16}+5\]
\[5\tfrac{1}{16}\]or if you prefer
\[\frac{81}{16}\]