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).

Question

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).

nnesha · Answer

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 · Answer

do you know what are like terms ?

anonymous · Answer

So the bottom numbers right not the exponents?

nnesha · Answer

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

nnesha · Answer

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 · Answer

make sense ?? :=)

anonymous · Answer

Yes I got it. Thank you for your help

nnesha · Answer

$$\large\rm \color{reD}{5x^3 }+ 3x^2 - 5x + 4 +\color{ReD}{8x^3} -5x^2 + 8x + 9$$ 
 like terms so you can combine their coefficients 
(5+8)x^3

nnesha · Answer

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