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menaynjy15
@menaynjy15
July 2022
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а в 3 степени -5а во 2 степени+20-4а=0
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msaratovskiy
А^3−5а^2+20−4а=0
а⋅(а^2−4)−5(а^2−4)=0
(а−5)⋅(а^2−4)=0
(а−5)⋅(а−2)⋅(а+2)=0
а−5=0
а−2=0
а+2=0
а1=5
а2=2
а3=−2
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Answers & Comments
а⋅(а^2−4)−5(а^2−4)=0
(а−5)⋅(а^2−4)=0
(а−5)⋅(а−2)⋅(а+2)=0
а−5=0
а−2=0
а+2=0
а1=5
а2=2
а3=−2