Thực hiện nhân, chia các phép tính: (x^2 + 4x^2 /x^2 -4)
Giải thích
x2+4x2x2−4.x+22x−4+2−3xx3−4x.x2−4x−2=x4−4x2+4x2x+2x−2.x+22x−2+2−3xxx−2=x4x+2x−2.x2+2x+4−6x2xx−2=x3.x−222.(x+2)x−2=x3.x−22x+2
x2+4x2x2−4.x+22x−4+2−3xx3−4x.x2−4x−2=x4−4x2+4x2x+2x−2.x+22x−2+2−3xxx−2=x4x+2x−2.x2+2x+4−6x2xx−2=x3.x−222.(x+2)x−2=x3.x−22x+2