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anonymous

  • one year ago

How do I solve Polynomial equations?

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  1. anonymous
    • one year ago
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    3.2x^3+4.8x+3.7 2.1x^3+6.3x-2.9 --------------- ?

  2. amistre64
    • one year ago
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    the sum of 2 polynomials is a polynomial ... you just add up like parts.

  3. amistre64
    • one year ago
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    think of them as a hidden number, and the x parts determine the placement of a digit.

  4. anonymous
    • one year ago
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    So the 3.2x^3 over 2.1x^3 part is 3.3x^9?

  5. amistre64
    • one year ago
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    assuming that we are adding them to start with ... almost. x^3 is a common factor; like 3a + 2a = (3+2)a, not 5a^2

  6. amistre64
    • one year ago
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    3.2x^3 + 2.1x^3 = (3.2 + 2.1)x^3

  7. anonymous
    • one year ago
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    but how would i write that on a graph? it's just boxes i place the digits in.

  8. amistre64
    • one year ago
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    im not sure what you mean by that

  9. amistre64
    • one year ago
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    can you post a picture of your problem?

  10. anonymous
    • one year ago
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  11. amistre64
    • one year ago
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    yeah, you are just adding like parts ...

  12. amistre64
    • one year ago
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    what is 3.2 + 2.1 ?

  13. anonymous
    • one year ago
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    just the first part of the equation. what would the answer look like?

  14. amistre64
    • one year ago
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    what is 3.2 + 2.1 ?

  15. anonymous
    • one year ago
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    5.3 lol...

  16. amistre64
    • one year ago
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    then we can work it as: \[3.2x^3 + 2.1x^3 = (\color{red}{3.2 + 2.1})x^3=\color{red}{5.3}x^3\]

  17. anonymous
    • one year ago
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    ok. i think i might have it. just give me a second.

  18. amistre64
    • one year ago
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    k

  19. anonymous
    • one year ago
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    ok so i hav it this far. look right so far? what symbols would i use? (+/-)

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  20. amistre64
    • one year ago
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    is 6+4 a positive or negative number?

  21. anonymous
    • one year ago
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    positive?

  22. amistre64
    • one year ago
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    then that ones a + is 3.7-2.9 a positive or negative number?

  23. anonymous
    • one year ago
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    positive? 0.8

  24. amistre64
    • one year ago
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    yes, so its a + the operation symbol just indicates the sign of the resulting operation you did on the numbers. a postive result gives us + a negative result gives us -

  25. anonymous
    • one year ago
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    Ok. Thank you so much! It seems kinda easy now that I know how it's done. Thanks!

  26. amistre64
    • one year ago
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    good luck :)

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