Toán Lớp 6: (2xy+1)^2-(2x+y)^2 ai lm nhanh+đúng mk vote 5 sao+cảm ơn+ctrlhn

Question

Toán Lớp 6:  (2xy+1)^2-(2x+y)^2 ai lm nhanh+đúng mk vote 5 sao+cảm ơn+ctrlhn

thanhtung · Answer

#huy   (2xy+1)^2-(2x+y)^2   =(2xy+1+2x+y)(2xy+1-2x-y)   =[2x(y+1)+(y+1)][2x(y-1)-(y-1)]   =(2x+1)(y+1)(2x-1)(y-1)

tuyethutanhthu · Answer

@An@                   2    x    y    +    1    )       2      &minus;       (    2    x    +    y    )       2         (2xy+1)2-(2x+y)2                  =     (    2    x    y    +    1    +    2    x    +    y    )      (    2    x    y    +    1    &minus;    2    x    &minus;    y    )        =(2xy+1+2x+y)(2xy+1-2x-y)                  =     [    2    x     (    y    +    1    )     +     (    y    +    1    )     ]      [    2    x     (    y    &minus;    1    )     &minus;     (    y    &minus;    1    )     ]        =[2x(y+1)+(y+1)][2x(y-1)-(y-1)]                  =     (    2    x    +    1    )      (    y    +    1    )      (    2    x    &minus;    1    )      (    y    &minus;    1    )