## 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).

1. 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

2. Nnesha

do you know what are like terms ?

3. anonymous

So the bottom numbers right not the exponents?

4. Nnesha

ohh if the variables and exponent are the same then you can add their coefficient (just add/subtract coefficient )

5. 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

6. Nnesha

make sense ?? :=)

7. anonymous

Yes I got it. Thank you for your help

8. 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

9. Nnesha

okay alright descending means write from highest degree to lowest x^3,x^2,x :=)