СРОЧНО ОЧЕНЬ!1!!1 РЕШИТЕ НЕРАВЕНСТВО!!11!!1
(x+2)(x-3)<0
(x-4)(x+3)≤0
x(2-x)>0
0,4x(7-x)(x-0,8)≤0
(x+2)(x-3)<0
(x-4)(x+3)≤0
x(2-x)>0
0,4x(7-x)(x-0,8)≤0
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Answers & Comments
x^2-x-6=0
D=1-4*1*(-6)=25
x1=1+5
-----------=3
2
x2=1-5
--------=-2
2
2-oe
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x^2+3x-4x-12 - 0
x^2-x-12=0
D=1-4*1*(-12)=49
x1=1+7
----------=4
2
x2=1-7
---------=-3
2
#3
x>0
2-x>0
x<0
#4
0.4x=<0
x=<0.4
7-x=<0
x=>7
x-0.8=<0
x=<0.8
Все пожалуйста.