To answer this, we need to know the expression for the area of a square which is the square of its side length or:
Area = a²
Solving for the side length,
a = √area
a = √144x²
a = 12x
Therefore, the side length is 12x.
You HAVE to use Pemdas.
2[3(4^2+1)]-2^3
2(3(16+1))-2^3
2(3(17))-2^3
2*51-2^3
102-8
94.
Explanation: you use Pemdas P-parenthesis
E-exponents
M-multiplication
D-division
A-addition
S-subtraction
Plug in your coefficients