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forty-two

  • 3 years ago

What is the expression in factored form? 5x2 – 80y2

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  1. wio
    • 3 years ago
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    \[ a^2 - b^2 = (a-b)(a+b) \]

  2. forty-two
    • 3 years ago
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    what do you do after that

  3. wio
    • 3 years ago
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    What did you get?

  4. seidi.yamauti
    • 3 years ago
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    80y2 is 80y²?

  5. forty-two
    • 3 years ago
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    yes it is, and i got -6375=-6375, so the answer is (5+80)(5-80)?

  6. forty-two
    • 3 years ago
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    @wio

  7. wio
    • 3 years ago
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    Umm, first of all, where is your x and y?

  8. wio
    • 3 years ago
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    Actually, first of all, what are you choosing for a and b?

  9. forty-two
    • 3 years ago
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    5 and -80

  10. precal
    • 3 years ago
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    |dw:1356576196048:dw|

  11. precal
    • 3 years ago
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    factor out 5 first

  12. forty-two
    • 3 years ago
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    okay, thank you so much, that was alot simpler than I thought.

  13. precal
    • 3 years ago
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    yw

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