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anonymous

  • one year ago

Write the answer in descending powers of x. (5x2 - 7)(5x2 + 7)

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  1. anonymous
    • one year ago
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    ok so this one is easy

  2. TheSmartOne
    • one year ago
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    |dw:1433944463257:dw|

  3. anonymous
    • one year ago
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    |dw:1433944456863:dw|

  4. TheSmartOne
    • one year ago
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    and welcome to OpenStudy! @lauraoar

  5. TheSmartOne
    • one year ago
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    Just use the foil method. What do you get?

  6. anonymous
    • one year ago
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    thank you! so whats the answer?

  7. TheSmartOne
    • one year ago
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    Sorry, we do not give answers on OpenStudy.

  8. anonymous
    • one year ago
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    |dw:1433944702920:dw|

  9. TheSmartOne
    • one year ago
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    We are here to guide you (the asker) to the answer. OpenStudy's prime purpose is to help you learn...

  10. anonymous
    • one year ago
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    sorry I messed up on the equation lol

  11. anonymous
    • one year ago
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    oh sorry im new lol, but this is my first time learning this. can yall give me like a step by step solution?

  12. anonymous
    • one year ago
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    |dw:1433944935922:dw|

  13. anonymous
    • one year ago
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    thanks so much!

  14. TheSmartOne
    • one year ago
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    An easier method for this question is to use this formula: \(\sf\Large (a+b)(a-b)=a^2-b^2\)

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