Inactive Tutor answered • 06/06/19
Tutor
New to Wyzant
n = 904042
n - 2 = 904040
n + 2 = 904044
n2 - (n - 2) * (n + 2) = n2 - (n2 - 4) = 4
How can I solve 904042² - 904040 × 904044 without a calculator?
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