\(\left(x-y\right)\left(x^2+xy+y^2\right)-\left(x+y\right)\left(x^2-xy+y^2\right)=-2y^3\)

\(x-y.x^2+xy+y^2-x-y.x^2-xy+y^2=-2y^3\)

\(\left(x+x-x-x\right)-\left(y.y-y\right).\left(x^2.x^2\right)+\left(y^2+y^2\right)=-2y^3\)

\(0-\left(2y-y\right).x^4+2y^2=-2y^3\)

\(0-y.x^4+2y^2=-2y^3\)

\(-y.y^2.x^4+2=-2y^3\)

\(-y^3.x^4+2=-2y^3\)

hình như mk lm sai mk sẽ lm lại cách # thử

=>  (10x + 100x) + (11+9+20) = 150

=>   110x + 40 = 150

=>   110x = 110

=>   x = 1