Ответ:
a+10/a-10
Объяснение:
a^2-100=(a-10)(a+10)
a^2-20a+100=(a-10)(a-10)
(a-10)(a+10)/(a-10)(a-10)=a+10/a-10
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Verified answer
Ответ:
a+10/a-10
Объяснение:
a^2-100=(a-10)(a+10)
a^2-20a+100=(a-10)(a-10)
(a-10)(a+10)/(a-10)(a-10)=a+10/a-10