## Ayed Group Title I need help with this f(x)=2x^2+8x-8 2 years ago 2 years ago

1. lalaly Group Title

ok whats the question?

2. Ayed Group Title

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

3. BlingBlong Group Title

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

4. Nancy_Lam Group Title

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

5. BlingBlong Group Title

You would use the quadratic formula to solve the x intercepts

6. BlingBlong Group Title

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

7. Ayed Group Title

ok thanks guys

8. Ayed Group Title

How i can write ± in my calculator???

9. HawkCrimson Group Title

u dont

10. Ayed Group Title

ok I will try

11. BlingBlong Group Title

solve it algebraically don't use your calculator

12. Ayed Group Title

Finally I got it Thanks guys