Question

(a+2)^2=
(x-3)^2=
a^2+4ab+4b^2=
9m^2-6mn+n^2=
25a^2-9b^2=

Answer 1

$(a+2)^2=a^2+4a+4\\(x-3)^2=x^2-6x+9\\a^2+4ab+4b^2=(a+2b)^2\\9m^2-6mn+n^2=(3m-n)^2\\25a^2-9b^2=(5a-3b)(5a+3b)$