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мясник6
@мясник6
August 2022
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Gggggggggggggggggggрешите
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sedinalana
1
x≠4,x≠-1
(2x-7)(x+1)-(x+2)(x-4)=x+6
2x²+2x-7x-7-x²+4x-2x+8-x-6=0
x²-4x-5=0
x1+x2=4 U x1*x2=-5
x1=-1 не удов усл и x2=5
2
x≠0,x≠-2
5x*x-20=4*(x+2)
5x²-20-4x-8=0
5x²-4x-28=0
D=16+560=576
x1=((4-24)/10=-2 не удов усл
x2=(4+24)/10=2,8
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Answers & Comments
x≠4,x≠-1
(2x-7)(x+1)-(x+2)(x-4)=x+6
2x²+2x-7x-7-x²+4x-2x+8-x-6=0
x²-4x-5=0
x1+x2=4 U x1*x2=-5
x1=-1 не удов усл и x2=5
2
x≠0,x≠-2
5x*x-20=4*(x+2)
5x²-20-4x-8=0
5x²-4x-28=0
D=16+560=576
x1=((4-24)/10=-2 не удов усл
x2=(4+24)/10=2,8