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anonymous

  • one year ago

Given the expression 5a^2b – 13ab + 7a^3 – 4b, do the following as instructed below: a)Write the polynomial in descending order. b)Classify the polynomial by the number of terms. c)State the degree of the polynomial.

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  1. anonymous
    • one year ago
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    help please

  2. anonymous
    • one year ago
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    @ganeshie8

  3. anonymous
    • one year ago
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    @triciaal

  4. anonymous
    • one year ago
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    help please

  5. anonymous
    • one year ago
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    a) 7a^3 +5a^2b -13ab -4b

  6. anonymous
    • one year ago
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    b) Although the ^2b is unusual, the highest power seems to be ^3, therefore it would be a third degree equation.

  7. anonymous
    • one year ago
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    sorry, the answer I gave to b should have been the answer to c)

  8. anonymous
    • one year ago
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    oh ok but can you explian it to me to

  9. anonymous
    • one year ago
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    b) there are 4 terms in the equation, and since we only label equations up to third degree, then it must be called a polynomial

  10. anonymous
    • one year ago
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    what would you like me to explain @CUTEYPIE137

  11. anonymous
    • one year ago
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    In fact, it says its a polynomial in the question

  12. anonymous
    • one year ago
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    well um the descending order how did you get that @BPDlkeme234

  13. anonymous
    • one year ago
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    A linear equation is one in which the highest power is 1 (e.g x+ y = 12) A quadratic equation is one in which the highest power is 2 (e.g x^2 + y = 12) a cubic equation is one in which the highest power is 3 (e.g. (x^3 + y^2+3 =12) a polynomial is any equation in which the power is above this

  14. anonymous
    • one year ago
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    You asked about the descending order. I simply looked at the powers. It seems to me that the highest power was ^3 so that term came first. next ^2b (as I said this is unusual) but I put it second since we dont know what b is. Next 13ab because it is simply to the power of 1 (i.e. any number to the power of 1 is itself e.g. 13 ^1 = 13), but it had two variables a and b. and finally the last term which had only one variable (-4b) so it went last.

  15. anonymous
    • one year ago
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    oh thank you i understand um can you explain question b for me also please @BPDlkeme234

  16. anonymous
    • one year ago
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    OH NEVERMIND

  17. anonymous
    • one year ago
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    I know it would be a polynomial right @BPDlkeme234

  18. anonymous
    • one year ago
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    @CUTEYPIE137 it is asking you to COUNT the number of terms in the expression first term: 7a^3 2nd term: 5a^2b 3rd term: 13ab 4th term: -4b therefore there are 4 terms in this expression.

  19. anonymous
    • one year ago
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    ohhh

  20. anonymous
    • one year ago
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    You understand now?@CUTEYPIE137

  21. anonymous
    • one year ago
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    so it would be a cubic polynomial @BPDlkeme234

  22. anonymous
    • one year ago
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    only if the highest power was ^3 in the expression.

  23. triciaal
    • one year ago
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    is everything clear

  24. anonymous
    • one year ago
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    yes so in this polynomial the highest power is 3 so it is a cubic polynomial

  25. anonymous
    • one year ago
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    Well we dont use the words polynomial if it is a cubic equation, we simply say it is a cubic equation. polynomials are equations in which the power is greater than ^3

  26. anonymous
    • one year ago
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    you are right it is a cubic equation, if we dont know what ^2b is.

  27. anonymous
    • one year ago
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    oh ok thank so very much @BPDlkeme234

  28. triciaal
    • one year ago
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    not an equation

  29. anonymous
    • one year ago
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    correct @triciaal I had mentioned previously it was an expression not an equation

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