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Simplifying
d2 + d2 + d2 + d2 = 0
Combine like terms: d2 + d2 = 2d2
2d2 + d2 + d2 = 0
Combine like terms: 2d2 + d2 = 3d2
3d2 + d2 = 0
Combine like terms: 3d2 + d2 = 4d2
4d2 = 0
Solving
4d2 = 0
Solving for variable 'd'.
Move all terms containing d to the left, all other terms to the right.
Divide each side by '4'.
d2 = 0
Simplifying
d2 = 0
Take the square root of each side:
d = {0}
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