Find the roots for f(x) = 2×2 – 8 : x = 2 x = -2 x = 2 and x = -2 x = 2 and x = -4 *need answer soon* *must s

Question

Find the roots for f(x) = 2×2 – 8 :
x = 2
x = -2
x = 2 and x = -2
x = 2 and x = -4
*need answer soon* *must show work to receive credit*

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Savannah 7 hours 2021-09-14T07:10:50+00:00 2 Answers 0

Answers ( )

    0
    2021-09-14T07:11:52+00:00

    Answer is x=2 or -2 and x=2 or -4

    0
    2021-09-14T07:12:44+00:00

    Answer:

    x=2 and -2

    Step-by-step explanation:

    f(x)=2x^2-8

    set the function equal to zero to solve for x

    2x^2-8=0

    add 8 to both sides and divide by 2

    x^2=4

    take the square root of both sides to get x isolated

    √(x^2)=√4

    x= ±2

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