rozwiąż równania:
a) (x2-9)*(x2+3)=0
b) (x2+3)*(2x-5)=0
c) (x+3)*(2x-5)=0
a) x-7*x+5=0 \+7 x*x+5+7=7 \-5-7 x*x=0 2x=0
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a) x-7*x+5=0 \+7
x*x+5+7=7 \-5-7
x*x=0
2x=0