anonymous
  • anonymous
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).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Nnesha
  • Nnesha
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
Nnesha
  • Nnesha
do you know what are like terms ?
anonymous
  • anonymous
So the bottom numbers right not the exponents?

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Nnesha
  • Nnesha
ohh if the variables and exponent are the same then you can add their coefficient (just add/subtract coefficient )
Nnesha
  • Nnesha
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
Nnesha
  • Nnesha
make sense ?? :=)
anonymous
  • anonymous
Yes I got it. Thank you for your help
Nnesha
  • Nnesha
\[\large\rm \color{reD}{5x^3 }+ 3x^2 - 5x + 4 +\color{ReD}{8x^3} -5x^2 + 8x + 9\] like terms so you can combine their coefficients (5+8)x^3
Nnesha
  • Nnesha
okay alright descending means write from highest degree to lowest x^3,x^2,x :=)

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