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x in (-oo:+oo)
-(-10*0*5*(4/5)*(5/4)*x*y) = 0
0 = 0
-10*0*5*(4/5)*(5/4)*x = 0
0 = 0
-10*0*5*(4/5)*(5/4) = 0
0 = 0
-10*0*5*(4/5) = 0
0 = 0
-10*0*5 = 0
0 = 0
-10*0 = 0
0 = 0
-10*0 = 0 <=> -10 = 0 or -10*0 = 0 <=> 0 = 0
-10*0*5 = 0 <=> -10*0 = 0 or -10*0*5 = 0 <=> 5 = 0
4/5 = 0
4/5 = 0
x belongs to the empty set
-10*0*5*(4/5) = 0 <=> -10*0*5 = 0 or -10*0*5*(4/5) = 0 <=> 4/5 = 0
5/4 = 0
5/4 = 0
x belongs to the empty set
-10*0*5*(4/5)*(5/4) = 0 <=> -10*0*5*(4/5) = 0 or -10*0*5*(4/5)*(5/4) = 0 <=> 5/4 = 0
x = 0
-10*0*5*(4/5)*(5/4)*x = 0 <=> -10*0*5*(4/5)*(5/4) = 0 or -10*0*5*(4/5)*(5/4)*x = 0 <=> x = 0
y = 0
x naleu017Cy do R
-(-10*0*5*(4/5)*(5/4)*x*y) = 0 <=> -10*0*5*(4/5)*(5/4)*x = 0 or -(-10*0*5*(4/5)*(5/4)*x*y) = 0 <=> y = 0
x in (-oo:+oo)
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