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realstupidgirl
@realstupidgirl
August 2022
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разложите на множители
1)a³+27
2)1-8a³
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5kung
1)1-(8a-3)^2=(1+8a-3)(1-8a+3)=(8a-2)
2) 1-(64a^2-48a+9)=1-64a^2+48a-9=-64a^2+48a-8=64a^2-48a+8=8a^2-6a+1
8a^2-6a+1=0
дискриминант равно 4.
корни а1=0,5
а2=0,25
отв.8a2-6a+1=8(a-0,5)(a-0,25)
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Answers & Comments
2) 1-(64a^2-48a+9)=1-64a^2+48a-9=-64a^2+48a-8=64a^2-48a+8=8a^2-6a+1
8a^2-6a+1=0
дискриминант равно 4.
корни а1=0,5
а2=0,25
отв.8a2-6a+1=8(a-0,5)(a-0,25)