perimeter
Imagine you have a rectangle with a length of 16x+7 meters and the width of 24x+3 meters. what is the perimeter of the rectangle?
The perimeter is 80x+20
(x2+x−2)+(−2x2−9x−7)
what is −x2−8x−9
imagine you have a square where each side is 40x+55. what is the perimeter of the square?
the perimeter is 160x+220
(−8x2+3)+(x2+3x−8)
(4x2−3x+8)+(3x2−9x+4)