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taranicolee Group Title

can someone answer this quick question, i am having a brain bubble.... for 2(5x-4)^2 would you foil 5x-4 thennn multiply it by 2 or should i multiply thennn foil?

  • one year ago
  • one year ago

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  1. satellite73 Group Title
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    "foil" first order 'o operations say exponents first, multiplication second

    • one year ago
  2. satellite73 Group Title
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    \[2(5x-4)(5x-4)\]in other words

    • one year ago
  3. taranicolee Group Title
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    so i would take (10x^2-20x-20x+16) and multiply it by two to get 20x^2+80x+32?

    • one year ago
  4. satellite73 Group Title
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    yes, except that that is not correct

    • one year ago
  5. satellite73 Group Title
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    the first term is wrong since \(5x\times 5x=25x^2\) and not \(10x^2\)

    • one year ago
  6. taranicolee Group Title
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    hahah oooops. 5 x 5 is 25....

    • one year ago
  7. taranicolee Group Title
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    yeah hahah. ooopsie. but thank you so much!!

    • one year ago
  8. satellite73 Group Title
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    also the middle term should be \(-80x\) not \(+80x\)

    • one year ago
  9. taranicolee Group Title
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    thank you! ((:

    • one year ago
  10. satellite73 Group Title
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    yw

    • one year ago
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