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killyrslf
@killyrslf
August 2022
1
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Помогите с математикой. 7 класс.
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sedinalana
Verified answer
4
A)1,5x²y^4
Б)0,2x²y^4
В)0,25x^6y^4
Ответ А-1,Б-3,В-2
5
1)1/a(a+2b)-1/a(a-2b)=(a-2b-a-2b)/a(a²-4b²)=-4b/a(a²-4b²)=4b/a(4b²-a²)
2)4b/a(4b²-a²):4b²/(4b²-a)=4b/a(4b²-a²)*(4b²-a)/4b²=(4b²-a)/ab(4b²-a²)
a=-1;b=1
(4+1)/(-1*(4-1))=5/(-3)=-1 2/3
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Answers & Comments
Verified answer
4A)1,5x²y^4
Б)0,2x²y^4
В)0,25x^6y^4
Ответ А-1,Б-3,В-2
5
1)1/a(a+2b)-1/a(a-2b)=(a-2b-a-2b)/a(a²-4b²)=-4b/a(a²-4b²)=4b/a(4b²-a²)
2)4b/a(4b²-a²):4b²/(4b²-a)=4b/a(4b²-a²)*(4b²-a)/4b²=(4b²-a)/ab(4b²-a²)
a=-1;b=1
(4+1)/(-1*(4-1))=5/(-3)=-1 2/3