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yadimass1999
@yadimass1999
July 2022
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Пажалуйста разложите квадратный трехчлен на множители! -х^2+12х+45
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konane
-х^2+12x+45=0
D
=
b^2-4ac=
12^2-4*(-1)*45=144+180=324=18^2
x1=
(-b-sqrt D)/2a=
(-12-18)/2*(-1)=15
x2=(-12+18)/-2=-3
a(x-x1)(x-x2)= -(x-15)(x+3)
2 votes
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Answers & Comments
D= b^2-4ac=12^2-4*(-1)*45=144+180=324=18^2
x1=(-b-sqrt D)/2a=(-12-18)/2*(-1)=15
x2=(-12+18)/-2=-3
a(x-x1)(x-x2)= -(x-15)(x+3)