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сонечка02
@сонечка02
August 2022
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mikael2
Verified answer
A²-3a+1=7 a²-3a-6=0
a²=6+3a
a) 2a²-6a+2=12+6a-6a+2=
14
б) a²(a²-3a+1)-3a(a²-3a+1)=a(a²-3a+1)(a-3)=a(6+3a-3a+1)(a-3)=7(a²-3a)=
7(6+3a-3a)=
42
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Answers & Comments
Verified answer
A²-3a+1=7 a²-3a-6=0a²=6+3a
a) 2a²-6a+2=12+6a-6a+2=14
б) a²(a²-3a+1)-3a(a²-3a+1)=a(a²-3a+1)(a-3)=a(6+3a-3a+1)(a-3)=7(a²-3a)=
7(6+3a-3a)=42