The side of a square exceeds the side of another square by 4 cm and the sum of the area of the two squares in 400 sq cm. Find the dimension of the square.
Let side of smaller square = x cm
The side of other square = (x+4) cm
The sum of area of square = x^2+(x+4)^2 = 400
Solve we get
x = 12 and x = -16 (-16 cm not possible because length cannot be negative)