Find the difference of the polynomials below. Write your answer in descending order.
(x3 + 2x2 + 5x + 7) - (3x3 - 2.5x2 + 5x + 5)
assuming all you need is confirmation of the answer you obtained through your hard work,
-2x^3 + 4.5x^2 + 2
3-8
To find the difference of the given polynomials, we subtract the terms with the same degree.
The given polynomials are:
(x^3 + 2x^2 + 5x + 7) and (3x^3 - 2.5x^2 + 5x + 5)
Let's subtract the terms with the same degree:
x^3 - 3x^3 = -2x^3
2x^2 - (-2.5x^2) = 4.5x^2
5x - 5x = 0
7 - 5 = 2
Therefore, the difference of the polynomials above, written in descending order, is:
-2x^3 + 4.5x^2 + 2