Answer:
#BRAINLIST ME
Area of square is a side squared.
(x + 13)(x + 13) = 441
(x + 13)2 = 441
Take the square root of both sides
x + 13 = √(441)
Solve for x
x = 21 - 13
x = 8
The sides of the square are 8 + 13 = 21
The area is 21•21 = 441
1. Area of a Square=(Side)2
2. Plug in known information: 441=(x+13)2
3. Solve for x:
Option a (expand and use quadratic formula):
441=x2+26x+169
0=x2+26x-272
Use quadratic formula to solve for x
Option b:
Take the square root of both sides to obtain:
+/-(4411/2)=x+13
Thus, x=+/-(4411/2)-13
Since negative distance is incoherent, we can ignore the negative result as extraneous.
Simplification yields x=8.
