d(d+1)-d(d-1)=

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Solution for d(d+1)-d(d-1)= equation: 



d(d+1)-d(d-1)=

We move all terms to the left:

d(d+1)-d(d-1)-()=0

We add all the numbers together, and all the variables

d(d+1)-d(d-1)=0

We multiply parentheses

d^2-d^2+d+1d=0

We add all the numbers together, and all the variables

2d=0

d=0/2

d=0

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