решить неравеноство,,,
1.(x+2)(x-3)<0
2.(x-5)(x-1.5)<0
1.(x+2)(x-3)<0 x^2-x-6<0 x<3 и x<-2
x^2-x-6=0
D=1+24=25
x1=1+5
2
x1=3
x2=1-5
x2=-2
2.(x-5)(x-1.5)<0 x^2-6,5x+7,5<0 x<5 и x<1,5
x^2-6,5x+7,5=0
D=42,25-30=12,25
x1=6,5+3,5
x1=5
x2=6,5-3,5
x2=1,5
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Answers & Comments
1.(x+2)(x-3)<0 x^2-x-6<0 x<3 и x<-2
x^2-x-6=0
D=1+24=25
x1=1+5
2
x1=3
x2=1-5
2
x2=-2
2.(x-5)(x-1.5)<0 x^2-6,5x+7,5<0 x<5 и x<1,5
x^2-6,5x+7,5=0
D=42,25-30=12,25
x1=6,5+3,5
2
x1=5
x2=6,5-3,5
2
x2=1,5