Answer:
just multiply first x+1 to x+5 then add and subtract
D
Step-by-step explanation:
4ny²+4n²-4n-8+y⁴-2y²
63 m
Perimeter is 276, 2L + 2W = 276, so L + W = 138
L = 75
138 - 75 = W
1/4 of the first cage