х^2-4х-5=0х^2+7х+12=0х^2-11х+10=02х^2-3х+1=0. Created by Приветвсем100700. algebra-ru

х^2-4х-5=0х^2+7х+12=0х^2-11х+10=02х^2-3х+1=0...

Приветвсем100700 @Приветвсем100700

July 2022 1 10 Report

х^2-4х-5=0
х^2+7х+12=0
х^2-11х+10=0
2х^2-3х+1=0

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sedinalana

Verified answer

1)x²-4x-5=0
x1+x2=4 U x1*x2=-5
x1=-1 U x2=5
2)x²+7x+12=0
x1+x2=-7 U x1*x2=12
x1=-4 U x2=-3
3)x²-11x+10=0
x1+x2=11 U x1*x2=10
x1=1 U x1*x2=10
4)2x²-3x+1=0
D=9-8=1
x1=(3-1)/4=0,5 U x2=(3+1)/4=1

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