Question

I need help with this

f(x)=2x^2+8x-8

Answer 1

ok whats the question?

Answer 2

graph each parabola and give its vertex,axis,x-intercepts,and y-intercept.

Answer 3

x intercept
set y=0
y intercept
set x = 0

Vortex can be found by using the equation

-(2b/a) = x
where
a = 2
b = +8
in this case, to find the y value sub the x value you get from that equation and you have your vortex

To graph just make a table of x values to from -3 to +3 and sub them into the function to see what y values you get then graph the points and intercepts

Answer 4

use quadric formula solve\[\frac{-b \pm \sqrt{b^2-(4*a*c)}}{2*a}\]a=2
b=8
c=-8

Answer 5

You would use the quadratic formula to solve the x intercepts

Answer 6

also whenever dealing with the quadratic formula solve what is in the radical first, dont just punch all that stuff into your calculator

Answer 7

ok thanks guys

Answer 8

How i can write ± in my calculator???

Answer 9

u dont

Answer 10

ok I will try

Answer 11

solve it algebraically don't use your calculator

Answer 12

Finally I got it
Thanks guys