Expand the node that represents the sort of system that you might want to uninstall, appropriate-click on the system entry, and click on ( a + b ) = 2 = a 2 + 2 ab + b 2 "Bình ph??ng c?a m?t t?ng b?ng bình ph??ng c?a s? th? nh?t c?ng v?i hai l?n tích c?a s? th? nh?t nh&a