Answer:
3p-q-2
Explanation:
6p+2q-5 = Perimeter
6p+2q-5= (p-3) + (2p+3q) + ?
Subtract (p-3) from both sides:
(6p+2q-5) -(p-3) = (2p+3q) + ?
Subtract (2p+3q) from both sides:
(6p+2q-5) -(p-3) -(2p+3q) = ?
Simplify:
6p+2q-5-p+3-2p-3q
3p-q-2
Therfore the missing length is 3p-q-2 in simplest expression form.