解 (x+1/4)^2-(x+1/4)(x-1/4)=1/4
x^2+1/2 x+1/16-(x^2-1/16)=1/4
x^2+1/2 x+1/16-x^2+1/16=1/4
1/2 x+2/16=1/4
1/2 x=1/8
x=1/4
(x+1/4)²-(x-1/4)(x+1/4)=1/4
(x²+x/2+1/16)-(x²-1/16)=1/4
x/2+1/8=1/4
x/2=1/4-1/8
x/2=1/8
x=1/4
x^2+x/2+1/16-(x^2-1/16)=1/4
x/2=1/4-1/8=1/8
x=1/4