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EricCartman
@EricCartman
November 2021
2
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Решите неравенство : -3x^2+7x+4 < -2
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КрИсТиК18
Х^2+7х=4х+10 и -(х^2+7х)=4х+10
х^2+3х-10=0 -х^2-11х-10=0
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chewwing
-3х^2+7х+4+2<0
-3х^2+7х+6<0
3x^2-7x-6>0
3x^2-7x-6=0
D=b^2-4ac=(-7)^2-4*3*(-6)=49+72=121
b1,2=-b+-корень из D/2a=-7+-11/2*3
b1=2/3
b2=-3
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Answers & Comments
х^2+3х-10=0 -х^2-11х-10=0
-3х^2+7х+6<0
3x^2-7x-6>0
3x^2-7x-6=0
D=b^2-4ac=(-7)^2-4*3*(-6)=49+72=121
b1,2=-b+-корень из D/2a=-7+-11/2*3
b1=2/3
b2=-3