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Rkb<3NH Group Title

The product of (a − b)(a − b) is a^2 − b^2. A: Sometimes B: Always C: Never *is it a?

  • one year ago
  • one year ago

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  1. MathBlonde Group Title
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    I think it is B because it would end up being a^2-ab-ba+b^2 Unless there is a zero of course so then it could be A

    • one year ago
  2. radar Group Title
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    The product of (a-b)(a-b) is a^2-2ab+b^2 now what conclusion do you think.

    • one year ago
  3. helpingtutors Group Title
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    so its never hence C

    • one year ago
  4. Rkb<3NH Group Title
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    it cant be b because i choose it and i got it wrong, but i stuck between a and c

    • one year ago
  5. MathBlonde Group Title
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    Yes C sorry I got the letter mixed up

    • one year ago
  6. Rkb<3NH Group Title
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    okay well thank you and can you help me with 1 more?

    • one year ago
  7. MathBlonde Group Title
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    The answer is never

    • one year ago
  8. Rkb<3NH Group Title
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    Find the two products below. Compare and contrast, in complete sentences, the similarities and differences of the two. (x + 4)(x − 4) and (x + 4)(x + 4)

    • one year ago
  9. MathBlonde Group Title
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    the first would play out to x^2-4x+4x-16 leaving you with x^2-16 The second would become x^2+4x+4x+14 leaving you with x^2+8x+14 See the difference?

    • one year ago
  10. MathBlonde Group Title
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    So the second is +16 not +14

    • one year ago
  11. MathBlonde Group Title
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    Do you understand how to distribute those types of problems?

    • one year ago
  12. Rkb<3NH Group Title
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    no im confused?

    • one year ago
  13. MathBlonde Group Title
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    |dw:1344899884673:dw|

    • one year ago
  14. MathBlonde Group Title
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    the first x multiplies to each term in the second set of parenthesis. Then the first 4 multiplies to each term in the second set of parenthesis. Add all the terms together and you are good to go :)

    • one year ago
  15. Rkb<3NH Group Title
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    ohh okay! i get it

    • one year ago
  16. Rkb<3NH Group Title
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    (x + 4)(x + 4) x^2 + 4 + 4 + 16 this is what i get for the second equation

    • one year ago
  17. MathBlonde Group Title
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    Yes but remember to carry x along. The second and third terms you have just 4. But the 4 multiplies with x making them each 4x So x^2+4x+4x+16

    • one year ago
  18. MathBlonde Group Title
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    You will be expected to combine like terms as well. So go ahead and add the 4xs together giving you 8x making your final result for that problem x^2+8x+16

    • one year ago
  19. Rkb<3NH Group Title
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    oh okay can you help me out with the similarities and differences of the two equations?

    • one year ago
  20. MathBlonde Group Title
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    You can see from our calculations that it is the minus sign that causes the major differences. It turns positive 16 into negative 16 and instead of creating 8x with the 4xs, the 4xs end up canceling each other out because 1-1=0 so 4x-4x=0 as well.

    • one year ago
  21. MathBlonde Group Title
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    Notice though that both problems do yield an x^2 and a 16(just a negative 16 for one of them)

    • one year ago
  22. Rkb<3NH Group Title
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    oh yea thats true well thank you soo much, you have been a great help!(:

    • one year ago
  23. MathBlonde Group Title
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    No problem :) good luck!

    • one year ago
  24. Rkb<3NH Group Title
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    Thanks(:

    • one year ago
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