Question

根号12-2又根号0.5加根号18减根号八分之一等于多少怎么写？

Answer 1

方法如下，
请作参考：

追答

Answer 2

√12 - 2√0.5 + √18 - √1/8
=√3×4 - 2√1/2 + √9×2 - √2/(2×8)
=2√3 - 2√2/(2×2) + 3√2 - (√2)/4
=2√3 - 2×[(√2)/2] + 3√2 - (√2)/4
=2√3 - √2 + 3√2 - (√2)/4
=2√3 + [3-1-(1/4)]×√2
=2√3 + (7√2)/4