y = (2010)² . 2000 - 2000 . (1990)²
y = 4040100 . 2000 - 2000 . 3960100
y = 8080200000 - 7920200000
y = 160000000
y/10⁷ = 160000000/10000000 = 16/1 = 16
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y = (2010)² . 2000 - 2000 . (1990)²
y = 4040100 . 2000 - 2000 . 3960100
y = 8080200000 - 7920200000
y = 160000000
y/10⁷ = 160000000/10000000 = 16/1 = 16