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chungerforever Group Title

would the answer of (a − b)(a − b) be a^2 - ab^2 - b^2

  • 2 years ago
  • 2 years ago

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  1. TransendentialPI Group Title
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    FOIL First: a*a = a^2 Outside = -ab Inside = -ab Last = -b(-b) = +b^2 What do we do with the -ab and the -ab?

    • 2 years ago
  2. TransendentialPI Group Title
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    Tkink -x + -x = -2x

    • 2 years ago
  3. chungerforever Group Title
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    I know to combine itt

    • 2 years ago
  4. satellite73 Group Title
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    @chungerforever remember when we had \(5x+5x=10x\)? don't change the exponents here either

    • 2 years ago
  5. satellite73 Group Title
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    \(-ab-ab=?\)

    • 2 years ago
  6. chungerforever Group Title
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    oh minus! so just ab?

    • 2 years ago
  7. satellite73 Group Title
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    \(-10-10=?\)

    • 2 years ago
  8. chungerforever Group Title
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    oh I understand, so the answer is just a^2 - b^2?

    • 2 years ago
  9. satellite73 Group Title
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    hold the phone, careful arithmetic \(-10-10=?\)

    • 2 years ago
  10. satellite73 Group Title
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    hint, it is not 0

    • 2 years ago
  11. chungerforever Group Title
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    I'm sorry I have no idea, I'm not good at algebra ):

    • 2 years ago
  12. chungerforever Group Title
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    -10?

    • 2 years ago
  13. satellite73 Group Title
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    don't fret, we will work it out, but i was asking an arithmetic question \(-10-10=-20\)

    • 2 years ago
  14. satellite73 Group Title
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    \(-100-100=?\)

    • 2 years ago
  15. chungerforever Group Title
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    -200?

    • 2 years ago
  16. satellite73 Group Title
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    yes that is it !

    • 2 years ago
  17. satellite73 Group Title
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    \(-7-7=?\)

    • 2 years ago
  18. chungerforever Group Title
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    -14

    • 2 years ago
  19. satellite73 Group Title
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    ok good now we can move on to variables

    • 2 years ago
  20. satellite73 Group Title
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    \[-10-10=-20\] \[-100-100=-200\] \[-7-7=-14\] \[-12-12=-24\] and so on how about \[-x-x\]? well this must be the same as the others, namely \[-x-x=-2x\]

    • 2 years ago
  21. chungerforever Group Title
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    so -2ab?

    • 2 years ago
  22. satellite73 Group Title
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    notice that the exponent does not change spend $20, spend another $20 you have spent \(2\times 20=40\) yes you have it !

    • 2 years ago
  23. satellite73 Group Title
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    so "final answer" for \((a-b)(a-b)\) is ??

    • 2 years ago
  24. chungerforever Group Title
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    a^2 - 2ab - b^2?

    • 2 years ago
  25. satellite73 Group Title
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    yes that is it!

    • 2 years ago
  26. chungerforever Group Title
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    thank you so much! and sorry I was taking a while to reply. But thanks again I appreciate it (:

    • 2 years ago
  27. satellite73 Group Title
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    yw good work, hope you are understanding a bit more about combining like terms

    • 2 years ago
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