а)(2+3х)^2=4+12x+9x^2
б)(а-5b)^2=a^2-10ab+25b^2
в)(y+10)(y-10)=y^2-100
б)(а-5b)^2=a^2-10ab+25b^2=26b^2-10ab
а)(2+3х)^2=4+12x+9x^2
б)(а-5b)^2=a^2-10ab+25b^2
в)(y+10)(y-10)=y^2-100
а)(2+3х)^2=4+12x+9x^2
б)(а-5b)^2=a^2-10ab+25b^2=26b^2-10ab
в)(y+10)(y-10)=y^2-100