Răspuns :
196:x^2=7^2
196:x^2=49
x^2=196|49
x=V196|49
x=14|7
x=2
^-la puterea
|-Supra
V-radical
196:x^2=49
x^2=196|49
x=V196|49
x=14|7
x=2
^-la puterea
|-Supra
V-radical
196:x^2=7^4:7^2
x^2supra196=7^4supra7^2
7^2•x^2=196•7^4
49x^2=196•49•49
x^2=196•49
x=radical din196•49=98
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