Question

178 180 задание надос делать

Answer 1

$a^2+2a+1=(a+1)^2\x^2-6xy+9y^2=(x-3y)^2\b^2-12bc+36c^2=(b-6c)^2\n^2+14n+49=(n+7)^2$


$a^2-2ab+b^2=(a-b)^2\1-2m+m^2=(1-m)^2\m^2+12m+36=(m+6)^2\9m^2+18mn+9n^2=(3m+3n)^2\49-28a+4a^2=(7-2a)^2\64b^2+80b+25=(8b+5)^2$

Answer 2

спасибо