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k_lynn

  • one year ago

http://prntscr.com/86551j Simplify

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  1. k_lynn
    • one year ago
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    @kropot72

  2. anonymous
    • one year ago
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    -13x^2 - 10x + 12 Would you like steps?

  3. k_lynn
    • one year ago
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    I got \[6x ^{3}-14x ^{2}+12-10x\] But I don't think that's right.

  4. anonymous
    • one year ago
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    3x^3 - 3x^3

  5. k_lynn
    • one year ago
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    @Xep can you start from the beginning?

  6. anonymous
    • one year ago
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    Yes. You can rewrite the second group as -3x^3 - 6x^2 - 10 So just do 3x^3 - 3x^3 - 7x^2 - 6x^2 + 12x - 10

  7. Nnesha
    • one year ago
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    ^yep bec first you should distribute 2nd parentheses by negative one

  8. k_lynn
    • one year ago
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    so the + signs that were there before are canceled out now.

  9. k_lynn
    • one year ago
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    because of distributing -1

  10. anonymous
    • one year ago
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    Yes. Since you are multiplying that whole group by -1, the signs are simply reversed

  11. k_lynn
    • one year ago
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    ok.

  12. k_lynn
    • one year ago
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    I'm not sure how to combine the like terms because of the - signs.

  13. Nnesha
    • one year ago
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    what did you get after distributing by negative one ?

  14. k_lynn
    • one year ago
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    \[3x ^{3}-7x ^{2}+2-3x ^{3}-6x ^{2}-10x\]

  15. Nnesha
    • one year ago
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    yes right now just add the coefficient\[\huge\rm 3x ^{3}-7x ^{2}+2-3x ^{3}-6x ^{2}-10x\] of like terms like if like terms are -3x-4x =(-3-4)x

  16. k_lynn
    • one year ago
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    so for 3x^3 and 3x^3, when I add them together do I just have x^3?

  17. Nnesha
    • one year ago
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    no (3-3)X^3 3-3=0 WHAT do you get when you multiply anything by zero ?

  18. k_lynn
    • one year ago
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    0

  19. Nnesha
    • one year ago
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    yes so 0x^3 is just zero so that's how -3x^2 and 3x^3 cancel each other out

  20. k_lynn
    • one year ago
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    ok. So it's just kind of eliminated from the problem?

  21. k_lynn
    • one year ago
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    or cancelled from

  22. Nnesha
    • one year ago
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    yes right

  23. k_lynn
    • one year ago
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    \[-7x ^{2}+2-6x ^{2}-10x\] That's what's left right.

  24. Nnesha
    • one year ago
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    simplify there are LIKE terms combine them!

  25. k_lynn
    • one year ago
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    RIght. \[-13x ^{2}+2-10x\]

  26. Nnesha
    • one year ago
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    yep looks right ro you can write in standard form \[\huge\rm -13x^2-10x+2\]

  27. k_lynn
    • one year ago
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    Thanks so much!

  28. Nnesha
    • one year ago
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    np :)

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