B
banmaixanh123


1 + 2 can cua (x + 3) nhan voi ( x + 2 ) > 0 ta chuyen ve thi duoc 2 can cua (x + 3) nhan voi ( x + 2 ) > -1 bat phuong trinh nay co binh phuong len duoc khong ? va neu binh phuong duoc thi giai thich vi sao ?