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tatkm78
@tatkm78
July 2022
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решите пожалуйста 7-х(3+х)=(х+2)(5-х)
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olya115153
7-x(3+x)=(x+2)(5-x)
7-3x-x²=5x-x²+10-2x
7-3x-x²=-x²+3x+10
7-3x-x²+x²-3x-10=0
-6x-3=0
-6x=3
x=-3/6
x=-1/3
ответ: -1/3
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Answers & Comments
7-3x-x²=5x-x²+10-2x
7-3x-x²=-x²+3x+10
7-3x-x²+x²-3x-10=0
-6x-3=0
-6x=3
x=-3/6
x=-1/3
ответ: -1/3