Moi ra mới có cả đống:=="
1)
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/122033/pt-vo-ti-thu-10-pt-vo-ti-cuo-i-cu-a-hom-nay
2)
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/125260/kho
3)
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/127135/giai-phuong-trinh-bang-phuong-phap-dat-an-phu-khong-hoan-toan-help-me
4)
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/130370/giai-phuong-trinh
5)
http://toan.hoctainha.vn/Hoi-Dap/Cau-Hoi/129517/sqrt-2x-4-4-sqrt-2-x-sqrt-9x-2-16/37026#37026