Question: 3d^2+f^2-4e^2+2td^2-4te^2+2tf^2+3f^2+4td^2+....... = (.......)d^2 +(......)e^2+ (.......)f^2  ??????

How can ı write 3d^2+f^2-4e^2+2td^2-4te^2+2tf^2+3f^2+4td^2+....... as  (.......)d^2 +(......)e^2+ (.......)f^2 

so

3d^2+f^2-4e^2+2td^2-4te^2+2tf^2+3f^2+4td^2+....... = (.......)d^2 +(......)e^2+ (.......)f^2  ??????

 


 
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