127.
(5-х)^2=5^2-2*5х+x^2=25-10x+x^2
(3x-2)^2=9x^2-12x+4
(0.4a-5b)^2=0.16a^2-4ab+25b^2
(b^2-3)^2=b^4-6b^2+9
(m^3+n^2)^2=m^6+2m^3*n^2+n^4
(-5-2a)^2=25+20a+4a^2
Объяснение:
