Answer:
Side length: z + 4
Perimeter: 64
Step-by-step explanation:
Hello!
Since the area of a square is the square of the sde length,
using the special binomial product formula: (a+b)² = a² + 2ab + b²:
The side length of the square is (z+4)².
The perimeter is 4(z + 4), where z is 12:
The side length is z + 4, the perimeter is 64
