a^2-13a+22=
=a^2-2a-11a+22=
=a*(a-2)-11(a-2)=
=(a-11)*(a-2)
-b^2+2b+24=
=-b^2+6b-4b+24=
=-b*(b-6)-4(b-6)=
=(-b-4)*(b-6)
100c^2-50c+6=
=2(50c^2-25c+3)=
=2(50c^2-10c-15c+3)=
=2(10c*(5c-1)-3(5c-1))=
=2(10c-3)*(5c-1)
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Объяснение:
