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Mikks
@Mikks
July 2022
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(У-2)(У В 2+5) = У В 3-10
(У-1) (У В 2+1) = У В 3-У В +2 У-1
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yellok
1) (y-2)(y²+5)=y³-10
y³+5y-2y²-10=y³-10
y³+5y-2y²-10-y³+10=0
2y²-5y=0
y(2y-5)=0 ⇒ y=0
2y-5=0
y=5/2
2) (y-1)(y²+1)=y³-y²+2y-1
y³+y-y²-1=y³-y²+2y-1
y-2y=-1+1
-y=0
y=0
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Answers & Comments
y³+5y-2y²-10=y³-10
y³+5y-2y²-10-y³+10=0
2y²-5y=0
y(2y-5)=0 ⇒ y=0
2y-5=0
y=5/2
2) (y-1)(y²+1)=y³-y²+2y-1
y³+y-y²-1=y³-y²+2y-1
y-2y=-1+1
-y=0
y=0