利用因式分解解简便计算,十万火急﹙₁﹚3.14×56²-3.14×44²﹙²﹚1.222²×9﹣1.333²×4
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![利用因式分解解简便计算,十万火急﹙₁﹚3.14×56²-3.14×44²﹙²﹚1.222²×9﹣1.333²×4](/uploads/image/z/7065933-69-3.jpg?t=%E5%88%A9%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%A7%A3%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C%E5%8D%81%E4%B8%87%E7%81%AB%E6%80%A5%EF%B9%99%26%238321%3B%EF%B9%9A3.14%C3%9756%26%23178%3B%EF%BC%8D3.14%C3%9744%26%23178%3B%EF%B9%99%26%23178%3B%EF%B9%9A1.222%26%23178%3B%C3%979%EF%B9%A31.333%26%23178%3B%C3%974)
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利用因式分解解简便计算,十万火急﹙₁﹚3.14×56²-3.14×44²﹙²﹚1.222²×9﹣1.333²×4
利用因式分解解简便计算,十万火急
﹙₁﹚3.14×56²-3.14×44²
﹙²﹚1.222²×9﹣1.333²×4
利用因式分解解简便计算,十万火急﹙₁﹚3.14×56²-3.14×44²﹙²﹚1.222²×9﹣1.333²×4
﹙₁﹚3.14×56²-3.14×44²
=3.14(56²-44²)
=3.14(56+44)(56-44)
=3768
﹙²﹚1.222²×9﹣1.333²×4
=(1.222×3)²-(1.333×2)²
=(3.666+2.666)(3.666-2.666)
=6.332
两个都是平方差,3.14(56+44)(56—44)=3768 ,(1.222*3+1.333*2)(1.222*3-1.333*2)