(1/3√27-√24+3√2/3)乘以√18=多少?
问题描述：
(1/3√27-√24+3√2/3)乘以√18=多少?
答
x/12+（15-x）/24=1 两边乘24
2x+(15-x)=24
2x-x=24-15
答
(1/3√27-√24+3√2/3)x√18
=(√3-2√6+√6)x2√3
=(√3-√6)x2√3
=6-6√2