1) =36-а^2;
2) =121у^2-16;
3)= 64х^2-49а^2;
4) =225с^6-1;
5) = (10- q)×(10+q);
6) = (14p-r)×(14p+r);
7) = 5x-17y)×(5x+17y);
8) = (ab^2-3)×(ab^2+3);
9) c^2=корень из с;
10) =m^2-2m+1-121=m^2-2m-120;
m^2-2m-120=0;
D=4+480=484=22^2;
m1=2+22/2=12;
m2=2-22/2=-10.
Ответ:m1=12; m2=-10.