х^2-100=0
x^2=0+100
x^2=100
x=√100
x=10
х²-100=0
х²=100
х= ± v100
x=10 ; x= - 10
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х^2-100=0
x^2=0+100
x^2=100
x=√100
x=10
х²-100=0
х²=100
х= ± v100
x=10 ; x= - 10