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Numbers

  • 4 years ago

which is not an output for 2x squared-5? -3 45 27 -8

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  1. dpaInc
    • 4 years ago
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    the in/out table is obtained by the equation y = 2x^2 - 5. so if you add 5 and divide by 2 you'll get. (y+5)/2 = x^2. now, each of those are the y's (the output of the original equation) so if you stick in those values for y and you don't get a perfect square, then that choice is correct answer. for example, y=-3. x^2=1 perfect square. do this with the other numbers... until you don't get a perfect square.

  2. Abbie23
    • 4 years ago
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    He got the best medal^

  3. dpaInc
    • 4 years ago
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    you have the answer?

  4. Numbers
    • 4 years ago
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    -8

  5. Abbie23
    • 4 years ago
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    I was typing it our but you had the best answer :)

  6. dpaInc
    • 4 years ago
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    good!... i thought what i wrote didn't make any sense... :)

  7. Abbie23
    • 4 years ago
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    out*

  8. dpaInc
    • 4 years ago
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    thanks Abbie23... :)

  9. Abbie23
    • 4 years ago
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    You're welcome dpalnc! :)

  10. dpaInc
    • 4 years ago
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    @Abbie23 , you could also put your solution down so you get a medal from me.

  11. dpaInc
    • 4 years ago
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    just did.. besides, there's more than 1 way to look at a problem. if the asker could not understand my method, maybe she'll understand yours... :)

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