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maks341
@maks341
July 2022
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Помогите решить 6 примеров (С решением) *очень надо*
1) X²+3x+2=0
2)x²-7x+12=0
3)3x²+5x-2=0
4)9x²-6x+1=0
5)5x²-14x+8=0
6) 9x²-12x+4=0
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miron2077
Verified answer
X²+3x+2=0
D=9-8=1
х₁=(-3+1)/2=-1 х₂=(-3-1)/2=-2
x²-7x+12=0
D=49-48=1
х₁=(7+1)/2=4 х₂=(7-1)/2=3
3x²+5x-2=0
D=25+24=7²
х₁=(-5+7)/6=1/3 х₂=(-5-7)/6=-2
9x²-6x+1=0
D=36-36=0
х₁х₂=6/18=1/3
5x²-14x+8=0
D=196-160=6²
х₁=(14+6)/10=2 х₂=(14-6)/10=0,8
9x²-12x+4=0
D=144-144=0
х₁=х₂=12/18=2/3
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Answers & Comments
Verified answer
X²+3x+2=0D=9-8=1
х₁=(-3+1)/2=-1 х₂=(-3-1)/2=-2
x²-7x+12=0
D=49-48=1
х₁=(7+1)/2=4 х₂=(7-1)/2=3
3x²+5x-2=0
D=25+24=7²
х₁=(-5+7)/6=1/3 х₂=(-5-7)/6=-2
9x²-6x+1=0
D=36-36=0
х₁х₂=6/18=1/3
5x²-14x+8=0
D=196-160=6²
х₁=(14+6)/10=2 х₂=(14-6)/10=0,8
9x²-12x+4=0
D=144-144=0
х₁=х₂=12/18=2/3