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kosaroleg2016
@kosaroleg2016
October 2021
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Розкладіть на множники тричлен x²-9x+18
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Answers & Comments
Ульяна2030
X1+x2=9 U x1*x2=18
x1=3 U x2=6
x²-9x+18=(x-3)(x-6)
5 votes
Thanks 11
kosaroleg2016
Звідки ти взяла в кінці 1,5?Поясни, добре не знаю цю тему.
sedinalana
Verified answer
x^2-9x+18=x^2-2*4,5x+18=x^2-2*4,5x+20,25-2,25=
=(x-4,5)^2-2,25=
=(x-4,5-1,5)(x-4,5+1,5)=(x-6)(x-3)
8 votes
Thanks 13
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Answers & Comments
x1=3 U x2=6
x²-9x+18=(x-3)(x-6)
Verified answer
x^2-9x+18=x^2-2*4,5x+18=x^2-2*4,5x+20,25-2,25==(x-4,5)^2-2,25=
=(x-4,5-1,5)(x-4,5+1,5)=(x-6)(x-3)