Question

if the length of a square is decreased by 1 unit , the area will be 8 square units.Write an equation for the area of the square

Answer 1

(x-1)²=8.

Explanation:

1) if the length before decreasing is 'x', then after decreasing it is x-1;

2) then the area is (x-1)²=8.

PS. the length before decreasing is 1+2√2.