x^2-3=22
x^2-3-22=0
x^2-25=0
(x-5)(x+5)=0
x-5=0
x=5
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comprobación
5^2-3=22
5^2=25-3=22
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x^2-3=22
x^2-3-22=0
x^2-25=0
(x-5)(x+5)=0
x-5=0
x=5
▁▁▁▁▁▁▁▁
comprobación
x^2-3=22
5^2-3=22
5^2=25-3=22
x=5