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carlenstar281 Group Title

Math question help me!!!

  • one year ago
  • one year ago

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  1. carlenstar281 Group Title
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    (x^2-3x+1)- (x^2+2x+7) Answer = -5x-6 How i don't understand this ?

    • one year ago
  2. camoJAX Group Title
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    distribute the - sign through the (x^2+2x+7) and the x^2's will cancel. then go from there

    • one year ago
  3. skullpatrol Group Title
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    Do you understand now? @carlenstar281

    • one year ago
  4. carlenstar281 Group Title
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    yes sorta why do I have to distribute the minus sign

    • one year ago
  5. skullpatrol Group Title
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    Because the opposite of a sum is the sum of the opposites.

    • one year ago
  6. skullpatrol Group Title
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    $$-(a+b)=(-a)+(-b)$$

    • one year ago
  7. carlenstar281 Group Title
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    oh I got it now thanks :)

    • one year ago
  8. skullpatrol Group Title
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    And now you can use $$a+b=b+a$$ to move the terms around.

    • one year ago
  9. camoJAX Group Title
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    think of an imaginary -1 right there where the - sign it. \[(x^2-3x+1) - (x^2+2x+7)\] \[(x^2-3x+1) + (-x^2-2x-7)\]

    • one year ago
  10. camoJAX Group Title
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    \[x^2+-x^2=0\] they are like terms kinda like 1+-1=0

    • one year ago
  11. camoJAX Group Title
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    or you dont have to distribute it out either way they will cancel

    • one year ago
  12. skullpatrol Group Title
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    @camoJAX Please use parentheses :)

    • one year ago
  13. camoJAX Group Title
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    hahaha gotcha

    • one year ago
  14. skullpatrol Group Title
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    Thanks

    • one year ago
  15. skullpatrol Group Title
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    @carlenstar281 Do you want a more detailed explanation?

    • one year ago
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