55²+57²-100*57=? 因式分解要过程
3个回答
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55²+57²-100*57
=55²逗答悉 + 57×(57-100)
=55²举雀 - 57×43
=55² - (50+7)(50-7)
=55² - 50²山乎 + 7²
=(55+50)(55-50)+49
=105×5+49
=5025+49
=5074
=55²逗答悉 + 57×(57-100)
=55²举雀 - 57×43
=55² - (50+7)(50-7)
=55² - 50²山乎 + 7²
=(55+50)(55-50)+49
=105×5+49
=5025+49
=5074
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110*57
追答
110*57
=(100+10)X57
=100X57+10*57
=5700+570
=6270
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展开全部
=55^2+57(57-100)
=55^2-57*43
=55*55-55*43-2*43
=55(55-43)-2*43
=55*12-2*43
=55(2+10)-2*43
=55X2-2X43+55X10
=(55-43)X2+55X10
=12X2+55X10
=
=55^2-57*43
=55*55-55*43-2*43
=55(55-43)-2*43
=55*12-2*43
=55(2+10)-2*43
=55X2-2X43+55X10
=(55-43)X2+55X10
=12X2+55X10
=
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