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tamilkabilousova
@tamilkabilousova
July 2022
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При яких х значення тричлена -2х2+3х-1=0?
А)1;1/2
Б)-1;-1/2
В)2;1
Г)-1;2
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mandarinka55555
А) 1; 1/2
Розв'язання: -2х2+3х-1=0
2х2-3х+1
D=b^2-4ac= 9 -8=1
x1= (3-1)/4=1/2
x2=(3+1)/4= 1
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Answers & Comments
Розв'язання: -2х2+3х-1=0
2х2-3х+1
D=b^2-4ac= 9 -8=1
x1= (3-1)/4=1/2
x2=(3+1)/4= 1