Expand and simplify(3x+2)^2-(2x-1)^2

If you would like to calculate (3 * x + 2)^2 - (2 * x - 1)^2, you can do this using the following steps:

(3 * x + 2)^2 - (2 * x - 1)^2 =
9 * x^2 + 12 * x + 4 - (4 * x^2 - 4 * x + 1) =
9 * x^2 + 12 * x + 4 - 4 * x^2 + 4 * x - 1 = 
5 * x^2 + 16 * x + 3

The result is 5 * x^2 + 16 * x + 3.

Iwould say rat and vsu but i’m not 100% sure

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm