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OpenStudy (anonymous):
Find a pair of factors for each number by using the difference of two squares. a. 45 b. 77 c. 112
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OpenStudy (helder_edwin):
77=81-4=(9-2)(9+2)
OpenStudy (helder_edwin):
49=49-4=(7-2)(7+2)
OpenStudy (helder_edwin):
112=121-9=(11-3)(11+3)
OpenStudy (helder_edwin):
cool. fun.
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