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x in (-oo:+oo)
(-8*(x-2)^2)/5-(4*x) > 0
(-8*(x-2)^2)/5-4*x > 0
(-8*(x-2)^2)/5+(-4*5*x)/5 > 0
-8*(x-2)^2-4*5*x > 0
12*x-8*x^2-32 > 0
12*x-8*x^2-32 = 0
4*(3*x-2*x^2-8) = 0
3*x-2*x^2-8 = 0
DELTA = 3^2-(-8*(-2)*4)
DELTA = -55
DELTA < 0
4 = 0
4/5 > 0
4/5 > 0 // * 5^2
4*5 > 0
( 4 )
4 > 0
x należy do R
( 5 )
5 > 0
x należy do R
(-oo:+oo) 4 + 5 +
x in (-oo:+oo)
(-oo:+oo)
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