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anonymous

  • one year ago

Add the following polynomials, then place the answer in the proper location on the grid. Write the answer in descending powers of x. Find the sum of (5x^3 + 3x^2 - 5x + 4) and (8x^3 -5x^2 + 8x + 9).

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  1. Nnesha
    • one year ago
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    sum = add so just add both functions \[\large\rm 5x^3 + 3x^2 - 5x + 4 +8x^3 -5x^2 + 8x + 9\] we are adding so we can remove parentheses now combine like terms

  2. Nnesha
    • one year ago
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    do you know what are like terms ?

  3. anonymous
    • one year ago
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    So the bottom numbers right not the exponents?

  4. Nnesha
    • one year ago
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    ohh if the variables and exponent are the same then you can add their coefficient (just add/subtract coefficient )

  5. Nnesha
    • one year ago
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    here is an example 4x^2+ 5x^2 (variables and exponent are the same so we can combine them) (4+5)x^2 =9x^2

  6. Nnesha
    • one year ago
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    make sense ?? :=)

  7. anonymous
    • one year ago
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    Yes I got it. Thank you for your help

  8. Nnesha
    • one year ago
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    \[\large\rm \color{reD}{5x^3 }+ 3x^2 - 5x + 4 +\color{ReD}{8x^3} -5x^2 + 8x + 9\] like terms so you can combine their coefficients (5+8)x^3

  9. Nnesha
    • one year ago
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    okay alright descending means write from highest degree to lowest x^3,x^2,x :=)

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