Answer:

Step-by-step explanation:

Hope this helps!
Answer:
(x − 2)×(3x+1)
Step-by-step explanation:
We can use this method:

All I did is Subtracting x then adding x which will not affect the result because -x + x = 0
Since there are 2 length sides and 2 width sides, the best equation to represent the perimeter would be 2x + 2(10) = P