Question 374567
{{{(x-2)(x-2) = (x-2)^2 = x^2 - 4x+4 = 0}}}


{{{144w^2+648w+729 = (12w)^2 + 2*12*27w + 27^2 = (12w + 27)(12w + 27) = (12w + 27)^2 = 3^2(4w + 9)^2}}}.