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OpenStudy (anonymous):
given the expression: 1990*1991-1989*1990
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OpenStudy (anonymous):
3980
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
medal?
OpenStudy (anonymous):
uh how do you do that
OpenStudy (anonymous):
click where is says best response next to the response
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OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
no prob
OpenStudy (larseighner):
How to do it: factor 1990. That give 1990(1991-1989) = 1990(2) = 3980.
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