31.3 РАЗЛОЖиТЬ НА НОЖИТЕЛИ РЕШИТЬ:

1)A^2-49; 8)T^2-400/441

2)64-B^2; 9)25*x^2-36

3)C^2-2,25; 10)-16+49*y^2

4)2,89-D^2; 11)0,64-1/9*z^2

5)64/81-X^2; 12)4/25*t^2-36

6)100/121-Y^2;

7)Z^2-169/196;
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