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Solve for d
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d=0\times 2d^{2}+2d
Multiply 0 and 0 to get 0.
d=0d^{2}+2d
Multiply 0 and 2 to get 0.
d=0+2d
Anything times zero gives zero.
d=2d
Anything plus zero gives itself.
d-2d=0
Subtract 2d from both sides.
-d=0
Combine d and -2d to get -d.
d=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -1 is not equal to 0, d must be equal to 0.