Question

i do not understand how to do any of this its quadratic functions can someone help

Answer 1

where are the quadratic functions?

Answer 2

its asking me to find the equation of the axis of symmetry the problem is y=x^2-3

Answer 3

do oyu understand that the equation can be written in 'general' form as

\[y= ax ^{2}+bx + c\]

and its roots are
when y=0

Answer 4

if you look at YOUR equation can you write the values of a,b and c?

Answer 5

I cannot help because you went offline 2 minutes after posting your question.

Answer 6

If oyu can identify the values of a b and c in your equation based on the standard form I gave above, then I will help you find the axis of symmetry

Answer 7

i dont have wifi at my house and i left school is why i went offlline

Answer 8

and i dont know if i can find the values of a and b. it doenst tell me to do that it just tells me to find the axis of symmetry

Answer 9

you need to do what I asked to answer the question - it is not 'extra' work it is part of th eprocess to solve oyur question.

In GENERAL (that is for ALL quadratic equations) you can writhe them in the form

ax^2 + bx + c =0

for example
if the equation is 4x^2 -3x +27

then
a = 4
b= -3
c= 27

YOUR equation is
y= x^2 - 3

so compare your equation to my example and see if you can find the equivalent values for a, b and c

Answer 10

is this right? a=y b=x^2 c=3

Answer 11

no sorry

a is the number in front of the x^2
b is the number in front of the x
and c is th econstant term, with no x in it

Have another look and try again..

Answer 12

how do i figure out which is which?

Answer 13

your equation is

y = x^2 - 3

you need the form

y = a(x^2) +bx + c

just look at the general form, and compare it with your equation

find a value for a so that ax^2 is the same as x^2
find a value for b so that bx = 0
find a value for c such that c= -3

If you are having trouble doing this then I STRONGLY recommend that
a) you review your text,
b) look at this:
http://en.wikipedia.org/wiki/Quadratic_equation
c) and talk to your teacher.

This is all fundamental stuff about quadratics and parabolas

You must get an understanding of the form
ax^2 + bx +c = 0 before you can do much more in this subject