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milashcalennova
@milashcalennova
August 2022
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Разложите на множители квадратный трехчлен
1) 5x^2+2x-3
2)3x^2+4x-7
3)-3x^2+5x-8
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Answers & Comments
MizoriesKun
1)
5x^2+2x-3
D=4+60=64
x=(-2+8)/10=6/10=3/5
x=(-2-8)/10=-1
5*(x-3/5)(x+1)=(5x-3)(x+1)
2)
3x^2+4x-7
D=16+ 84=100
х=(-4+10)/6=1
х=(-4-10)/6=-14/6=-7/3
3*(х+ 7/3)(х-1)=(3х+7)(х-1)
3)
-3x^2+5x-8
D=25+96=121
x=(-5+11)/(-6)= -1
x=(-5-11)/(-6)= -16/(-6) =8/3
-3*(x- 8/3)(x+1)=(-3x+8)(x+1)
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Answers & Comments
D=4+60=64
x=(-2+8)/10=6/10=3/5
x=(-2-8)/10=-1
5*(x-3/5)(x+1)=(5x-3)(x+1)
2) 3x^2+4x-7
D=16+ 84=100
х=(-4+10)/6=1
х=(-4-10)/6=-14/6=-7/3
3*(х+ 7/3)(х-1)=(3х+7)(х-1)
3) -3x^2+5x-8
D=25+96=121
x=(-5+11)/(-6)= -1
x=(-5-11)/(-6)= -16/(-6) =8/3
-3*(x- 8/3)(x+1)=(-3x+8)(x+1)