How many such squares contain and equal number of red and black squares?

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Q: From the digits 2, 4, 6, 8, 0 how many number greater than 60, 000 can be formed? (a digit can only…

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Q: How many committees of six can be formed from 18 Republicans and 20 Democrats if three members of…

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.