Liczby 7 i -3 są pierwiastkami równania:
a) (x-3)(x+7)=0
b) (x+3)(x-7)=0
c) (x-3)(x-7)=0
d) (x+3)(x+7)=0
odp c
(-3+3)(-3+7)=0
0*4=0
0+0
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odp c
(-3+3)(-3+7)=0
0*4=0
0+0