(0,25)^2-x=256???????????

Question

(0,25)^2-x=256???????????

Answer 1

0,25^2-х=256
0,5-х=256
-х=256-0,5
-х=255,5
х=-255,5

Answer 2

(1/4)^(2-x)=4^4
4^(x-2)=4^4
x-2=4
x=6