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rabbit6070
@rabbit6070
July 2022
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Эти два примера, прошу
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MizoriesKun
1) (2a-7b)²-2(2a²-49b²)+(2a+7b)²=(2a-7b-2a-7b)²=(-14b)²=196b²
2) 8y³-26y²-13y+1=((2y)³+1)-(26y²+13y)=(2y+1)(4y²-2y+1)-13y(2y+1)=
=(2y+1)(4y²-2y+1-13y)= (2y+1)(4y²-15y+1)
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2) 8y³-26y²-13y+1=((2y)³+1)-(26y²+13y)=(2y+1)(4y²-2y+1)-13y(2y+1)=
=(2y+1)(4y²-2y+1-13y)= (2y+1)(4y²-15y+1)