What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3

 The required additive inverse of the given polynomial is

Step-by-step explanation:  We are given to find the additive inverse of the following polynomial :

Let Q be the polynomial that represents the additive inverse of the polynomial P.

Then, the sum of the polynomials P and  must be zero.

That is,

Thus, the required additive inverse of the given polynomial is

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.