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asyapavlova
@asyapavlova
July 2022
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СРОЧНООО!!! при каких значениях параметра а уравнение имеет один корень: а) 2х²+х - а=0 и б) 2х² -7х +3 - а = 0
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ВикаВикторовна
Verified answer
A) a=-1/8 или -0,125
2x²+x+0,125=0
D=1-4*2*0,125=1-1=0
x= -1/4 = -0,25
б) a= -3 1/8 = -3,125
2x²-7x+3+3,125=0
2x²-7x+6,125=0
D=49-4*2*6,125=49-49=0
x=7/4=1,75
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Answers & Comments
Verified answer
A) a=-1/8 или -0,1252x²+x+0,125=0
D=1-4*2*0,125=1-1=0
x= -1/4 = -0,25
б) a= -3 1/8 = -3,125
2x²-7x+3+3,125=0
2x²-7x+6,125=0
D=49-4*2*6,125=49-49=0
x=7/4=1,75