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Ffddx
@Ffddx
July 2022
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sedinalana
А
2x²-5x+6=0
D=25-48=-23
x∈∅
б
2x²-5x+3=0
D=25-24=1
x1=(5-1)/4=1
x2=(5+1)/4=1,5
в
2x²-5x+2=0
D=25-16=9
x1=(5-3)/4=0,5
x2=(5+3)/4=2
г
x²-(p+2)x+2p=0
D=p²+4p+4-8p=p²-4p+4=(p-2)²
x1=(p+2-p+2)/2=2
x2=(p+2+p-2)/2=p
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Answers & Comments
2x²-5x+6=0
D=25-48=-23
x∈∅
б
2x²-5x+3=0
D=25-24=1
x1=(5-1)/4=1
x2=(5+1)/4=1,5
в
2x²-5x+2=0
D=25-16=9
x1=(5-3)/4=0,5
x2=(5+3)/4=2
г
x²-(p+2)x+2p=0
D=p²+4p+4-8p=p²-4p+4=(p-2)²
x1=(p+2-p+2)/2=2
x2=(p+2+p-2)/2=p