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666DeadMemories666
@666DeadMemories666
July 2022
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a(x+6)+x(x-3a)=9 при x=2a-3
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dasha20010516
Ax+6a+x²-3ax=-2ax+6a+x²
1 votes
Thanks 1
GreatFilter
А(x+6)+x(x-3a)=9
ax+6a+x²-3ax=9
x²-2ax+6a=9
(2a-3)²-2a*(2a-3)+6(2a-3)=9
4a²-12a+9-4a²+6a+12a-18-9=0
6a-18=0
6a=18
a=6
2 votes
Thanks 3
666DeadMemories666
Спасибо огромное \^.^/
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Answers & Comments
ax+6a+x²-3ax=9
x²-2ax+6a=9
(2a-3)²-2a*(2a-3)+6(2a-3)=9
4a²-12a+9-4a²+6a+12a-18-9=0
6a-18=0
6a=18
a=6