7.29²×6-2.71²×6简便运算
问题描述:
7.29²×6-2.71²×6简便运算
100-(3x+2y)²分解因式的结果
在实数范围内分解因式:3x²-5
答
=6*(7.29^2-2.71^2)
=6*(7.29+2.71)(7.29-2.71)
=6*10*4.58
=60*4.58
=274.8