Объяснение:
а) а^2+b^2-2ab-25=
=(a-b)^2-5^2=(a-b-5)(a-b+5)
b) 36-b^2-c^2+2bc=
=36-(b^2-2bc+c^2)≠
=6^2-(b-c)^2=
=(6-(b-c)(6+(b-c)=
=(6-b+c)(6+b-c)
Объяснение:
а) а^2+b^2-2ab-25=
=(a-b)^2-5^2=(a-b-5)(a-b+5)
b) 36-b^2-c^2+2bc=
=36-(b^2-2bc+c^2)≠
=6^2-(b-c)^2=
=(6-(b-c)(6+(b-c)=
=(6-b+c)(6+b-c)