Rozwiaz rownanie
2(x-1)do kwadratu - (x+5)(x-5)+x kwadrat=6
2(x-1) ²-(x+5)(x-5)+x²=6
2( x²-2x+1)- x²+25+ x²=6
2x²-4x+2+25-6=0
2x²-4x+21=0
delta=16-4*2*21
delta=16-168
delta=-152<0, brak rozwiązań
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2(x-1)do kwadratu - (x+5)(x-5)+x kwadrat=6
2(x-1) ²-(x+5)(x-5)+x²=6
2( x²-2x+1)- x²+25+ x²=6
2x²-4x+2+25-6=0
2x²-4x+21=0
delta=16-4*2*21
delta=16-168
delta=-152<0, brak rozwiązań