1) x^3 - 25x=0
2) 5x(x-3) - 4x + 12=0
3) (2x+5)(2x+7)-(2x-3)^2=36
4) 2*(x+5) - x^2 - 5x=0
5) (2x-3)^2 - (x+5)^2=0
6) 6x(x-1999)-x+1999=0
mong giúp e vs ạ
Loga
Sinh Học lớp 12
