x
x+1
producto = x^2 +x suma = 2x+1
x^2+x-2x-1=71
x^2-x-72=0
(x-8)(x+7)=0
x-8=0 x=8
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x
x+1
producto = x^2 +x suma = 2x+1
x^2+x-2x-1=71
x^2-x-72=0
(x-8)(x+7)=0
x-8=0 x=8