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Đọc tiếp
http://olm.vn/hoi-dap/tim-kiem?q=gi%E1%BA%A3i+d%C3%B9m+mk%60+v%E1%BB%9Bi+c%C3%A1c+b%E1%BA%A1n+%C6%A1i+c%C3%B3+m%E1%BA%A5y+c%C3%A2u+mk%60+b%C3%ADt+l%C3%A0m+nh%C6%B0ng+ko+ch%E1%BA%AFc+ch%E1%BA%AFn+l%E1%BA%AFm+%E1%BA%A1c%C3%A2u+a%2C%28x-517%29+131%3D631c%C3%A2u+n%C3%A0y+d%E1%BB%85+ro%C3%A0i+k%E1%BB%87+c%E1%BB%A9+ghi+cho+h%E1%BA%BFtc%C3%A2u+b%287*x-15%29.3%3D2ch%E1%BA%B5ng+c%C3%B3+l%E1%BB%85+l%E1%BA%A1i+ko+b%C3%ADt+nh%C6%B0ng+c%C3%A1c+b%E1%BA%A1n+c%E1%BB%A9+vi%E1%BA%BFt+h%E1%BA%BFt+ra+nh%C3%A1+mk%60+%C4%91%C3%B4i%C3%AD+chi%E1%BA%BFu+%C3%BD+m%C3%A0c%C3%A2u+c88-3*%287+x%29%3D64c%C3%A2u+d%5B+%28x+32%29-17+%5D*2%3D42c%E1%BA%A5u+e%5B+61+%2853-x%29+%5D+*17%3D1785c%C3%A1c+b%E1%BA%A1n+gi%E1%BA%A3i+%C4%91%E1%BB%ABng++t%E1%BA%AFt+nh%C3%A1&grade=0
cái quái gì thế này , ma trận hả
link ấy mà