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Ayed

  • 4 years ago

I need help with this f(x)=2x^2+8x-8

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  1. lalaly
    • 4 years ago
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    ok whats the question?

  2. Ayed
    • 4 years ago
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    graph each parabola and give its vertex,axis,x-intercepts,and y-intercept.

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

  5. BlingBlong
    • 4 years ago
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    You would use the quadratic formula to solve the x intercepts

  6. BlingBlong
    • 4 years ago
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    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
    • 4 years ago
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    ok thanks guys

  8. Ayed
    • 4 years ago
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    How i can write ± in my calculator???

  9. HawkCrimson
    • 4 years ago
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    u dont

  10. Ayed
    • 4 years ago
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    ok I will try

  11. BlingBlong
    • 4 years ago
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    solve it algebraically don't use your calculator

  12. Ayed
    • 4 years ago
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    Finally I got it Thanks guys

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