tìm A a) A/x^3+x^2-2x=1/x+2 b)(x-2)A/y=x^2-4/(x+2)y c)(x^2+2xy+y^2):A/(2x^2+xy-y^2):A=x+y/2x-y d)x-x^2/5x^2-5=x/A e)-x^2+2xy-y^2/x+y=A/y^2-x^2
Loga
Sinh Học lớp 12
