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The total number of pairs of integers (x,y) which satisfy the equation x²-4xy+5y²+2y-4=0 is = [?]

asked Mar 24, 2017

Mathematics
college

1 answer

4 votes

77.0k views

How many protons and electrons does an osmium atom have? a niobium atom?

asked Feb 9, 2015

Chemistry
high-school

2 answers

4 votes

136k views

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