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De acuerdo al planteamiento: n² - (n+1)²= 25
Desarrollando.
n² -(n² +2n+1)= 25
n² -n² -2n-1= 25
-2n= 25+1
n= 26/-2
n=-13
Los números son:
n= -13
n+1= -13+1= -12