10x^2y*(-3xy^2)^3=10x^2y* (-27x^3y^6)=-270x^5y^7
(x+4y)^2-(4y-x)(x+4y)=x^2+8xy+16y^2-16y^2+x^2=2x^2+8xy
ab^3-9a^3b=ab(b^2-9a^2)
2a^2+12a+18=2(a^2+6a+9)
{2(2X-Y)+3(2X+Y)=32, {4x-2y+6x+3y=32, {10x+y=32, {y=32-10x, {y=32-10x,
{5(2X-Y)-2(2X+Y)=4 {10x-5y-4x-2y=4 {6x-7y=4 {6x-7(32-10x)=4 {6x-224+70x=4
{y=32-10x, {y=2,
{76x=228 {x=3 Ответ: (3; 2)