Ответ:
1 = х²+ху-ах-ау
3= tb+t+sb+s
5= ab-3a+2b-6
7= dt+5d-4t-20
9= x²+8x-7x-56
11= 4a-a²+24-6a
13= a²+3a+5a+15
15= x²-11x-9x+99
17= -c+7c+3c-21
19= 6a²-14a+27a-63
21= 40x²+5xy-72xy-9y²
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Ответ:
1 = х²+ху-ах-ау
3= tb+t+sb+s
5= ab-3a+2b-6
7= dt+5d-4t-20
9= x²+8x-7x-56
11= 4a-a²+24-6a
13= a²+3a+5a+15
15= x²-11x-9x+99
17= -c+7c+3c-21
19= 6a²-14a+27a-63
21= 40x²+5xy-72xy-9y²