а)(m+n)^2=m^2+2mn+n^2
б)(c-d)^2=c^2-2cd+d^2
В) (х+9)^2=x^2+18x+81
г)(8-а)^2=64-16a+а^2
д)(a-25)^2=a^2-50a+625
е)(40+b)=1600+80b+b^2
Ж)(0,2-х)^2=0,04-0,4x+x^2
з)(к+0,5)^2=k^2+k+0,25
а)(m+n)^2=m^2+2mn+n^2
б)(c-d)^2=c^2-2cd+d^2
В) (х+9)^2=x^2+18x+81
г)(8-а)^2=64-16a+а^2
д)(a-25)^2=a^2-50a+625
е)(40+b)=1600+80b+b^2
Ж)(0,2-х)^2=0,04-0,4x+x^2
з)(к+0,5)^2=k^2+k+0,25