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anonymous

  • 5 years ago

Besides 0, where does the equations y=4x and 2x^2 cross? (no calculator)

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  1. amistre64
    • 5 years ago
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    cross what?

  2. amistre64
    • 5 years ago
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    each other...ok right?

  3. anonymous
    • 5 years ago
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    yes, where the two equations cross, I will need to to plug into the bounds of green's theorem

  4. amistre64
    • 5 years ago
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    we want to know where y = y really and y = 4x and y = 2x^2 so..... 4x = 2x^2 when? 0 = 2x^2 -4x 0 = 2x(x-2) ; recall that any number times zero will equal zero. so either (0)(x-2) = 0 or; 2x(x-2) = 0 2x=0 when x = 0 x-2 = 0 when x = 2

  5. amistre64
    • 5 years ago
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    green has a theorum?

  6. amistre64
    • 5 years ago
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    ....im pretty sure your smart enough to catch that :) 2x(0 = 0 is what I meant lol

  7. anonymous
    • 5 years ago
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    thanks, I hate forgetting basic factoring and algebra

  8. amistre64
    • 5 years ago
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    it takes practice, it like typing....you can be a pro at it and still mess it up lol

  9. anonymous
    • 5 years ago
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    yup thanks, I've been spoiled by a calc and my professor refuses us to ever use on in class

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