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Virgo91684

Multiply. (7b+7)^2 I get confused,do I use FOIL in this?

  • one year ago
  • one year ago

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  1. Kuoministers
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    you dont have too. use a^2 + 2ab + b^2

    • one year ago
  2. Hero
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    I prefer distributive rule: (7b + 7)(7b + 7) = 7b(7b + 7) + 7(7b + 7) = 49b^2 + 49b + 49b + 49 = 49b^2 + 98b + 49

    • one year ago
  3. Hero
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    You know, distributive rule is an actual mathematical property. FOIL is just an acroymn someone made up.

    • one year ago
  4. Virgo91684
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    Ah, ok I see now. I didn't know that,but it helps me sadly to think of First, Outer, Inner and Last

    • one year ago
  5. Hero
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    FOIL is something kids in high school learn.

    • one year ago
  6. Umar97
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    distibutive is the easiest way of doing this. I learned distributive last year. helped alot.

    • one year ago
  7. Virgo91684
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    Lol well they're teaching it in our college. Either way thank you so much for your help

    • one year ago
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