Question 482234
(x-4)^2 *4 = 400 We can divide each side by 4.
(x-4)^2 = 100
x^2 -8x +16 = 100. minus 100 from each side.
x^2 - 8x -84 = 0
(x -14)(x+6)
14, -6.
disregard the -6.
(10)(10)(4) = 400 cm cubed.
The original tin was 14 cm by 14 cm, area = 196 cm^2.
Cleomenius.