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thatgirl666

  • 3 years ago

The product of (a + b)(a − b) is a perfect square trinomial.

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  1. thatgirl666
    • 3 years ago
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    Sometimes Always Never

  2. ZeHanz
    • 3 years ago
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    If you FOIL it: First: a*a = a² Outer: a*(-b) = -ab Inner: b*a = ab Last: b*(-b) = -b² Add up everything: a² + -ab + ab + b². What do you think about the middle two terms?

  3. thatgirl666
    • 3 years ago
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    theyre the same?

  4. timo86m
    • 3 years ago
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    it expands to a^2-b^2 so it never a trinomial

  5. thatgirl666
    • 3 years ago
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    So its never?

  6. timo86m
    • 3 years ago
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    never cuzz the middle terms cancel out meaning you always get a binomial, not a trinomial

  7. thatgirl666
    • 3 years ago
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    ohhhh okay :) thank you!

  8. ZeHanz
    • 3 years ago
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    The middle two terms cancel: -ab+ab=0, so you are left with only a²-b². So never a trinomial; there are only two terms.

  9. gahm8684
    • one year ago
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    for anyone lookin at this the answer is not never

  10. Hahawowoh
    • 7 months ago
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    its not always cause I just got it wrong

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