Inactive Tutor answered • 03/12/22
Tutor
New to Wyzant
m^2 + n^2 = 140
mn= 49
(m-n)^2 = m^2 - 2mn + n^2 = 140 -2mn = 140 -2(49) = 140 - 98 = 42
(m-n)^2 = 42
d is correct
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