If the side length of a square increases by 50 cm, the area will increase by 135 square meters. How many square meters is the original square area

If the side length of a square increases by 50 cm, the area will increase by 135 square meters. How many square meters is the original square area


(x+5)^2-x^2=135
10x+25=135
10x=110
x=11
11*11=121