因式分解13.1*3.14+3.14*0.715+1.54*31.4=?
问题描述:
因式分解13.1*3.14+3.14*0.715+1.54*31.4=?
答
13.1*3.14+3.14*0.715+1.54*31.4=1.31*31.4+7.15*31.4+1.54*31.4
=31.4*(1.31+7.15+1.54)
=31.4*10
=314