ac·(√2+√6)/8=3+√3ac=(3+√3)x8/(√2+√6)ac=(3+√3))(√6-√2)x8/(√2+√6)(√6-√2)ac=(3+√3))(√6-√2)x8/4ac=(3√6-3√2+3√2-√6)x8/4ac=2√6x2ac=4√6
ac·(√2+√6)/8=3+√3ac=(3+√3)/(√2+√6)/8ac=8(3+√3)/(√2+√6)=8(3+√3))(√2-√6)/-4=-2(3√2+√6-3√6-3√2)=4√6
不懂