Question

100X2 -20 x +1=0 by completing the square met

Answer 1

100x^2 - 20x= -1
x^2 - 1/5x = -1
x^2-2×1/10x = -1
x^2 - 2×1/10×x=-1
x^2-2×1/10×x=-1
x^2-2×1/10×x+(1/10)^2=1+(1/10)^2
(x-1/10)^2=(100+1)/100
(x-1/10)^2=101/100
x-1/10=root 101/10
x=root101/100 + 1/10
x=(root101+10)/100
$x = (\sqrt{101} + 10) \div 100$