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nastena200111
@nastena200111
August 2022
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Пожалуйста помогите решить
разложите на множители
-7a^2+14a-7
5ab-15b-5a+15
a^4-1
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Answers & Comments
RoOstok
-7a^2+14a-7=-7(a²-2a+1)=-7(a+1)²
5ab-15b-5a+15=5(ab-3b-a+3)=5b(a-3)+(a-3)=5(a-3)(b+1)
a^4-1=(a
²-1)(a²+1)=(a-1)(a+1)(a²+1)
8 votes
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Answers & Comments
5ab-15b-5a+15=5(ab-3b-a+3)=5b(a-3)+(a-3)=5(a-3)(b+1)
a^4-1=(a²-1)(a²+1)=(a-1)(a+1)(a²+1)