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zapadnova01
@zapadnova01
August 2022
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(x+5)^2+(x-2)^2+(x-7)(x+7)=11x+80
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ma220299
X²+10x+25+x²-4x+4+x²-49=11x+80
3x²+6x-20-11x+80=0
3x²-5x-100=0
d=25+1200=1225
x1=
2 votes
Thanks 7
ma220299
x1=(5+35)/6=40/6=6 целю 2/3
ma220299
x2=(5-35)/6=-30/6=-5
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Answers & Comments
3x²+6x-20-11x+80=0
3x²-5x-100=0
d=25+1200=1225
x1=