求文档:利用分解因式法计算13.1x3.14 314x0.715 1.54x31.4
问题描述:
求文档:利用分解因式法计算13.1x3.14 314x0.715 1.54x31.4
答
13.1x3.14 314x0.715 1.54x31.4
=13.1x3.14+3.14x71.5+15.4x3.14
=(13.1+71.5+15.4)x3.14
=100x3.14
=314
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