(5-2乘9根號(hào)三-2)-3乘(根號(hào)2+1)
=5-18√3-2-3√2-3
=-18√3-3√2
=-18×1.732-3×1.414
=-31.176-4.242
=-35.418
≈-35對(duì)不起剛才我打錯(cuò)了，應(yīng)該是5-2乘（根號(hào)三-2）然后再減后面的(5-2乘根號(hào)三-2)-3乘(根號(hào)2+1)=5-2√3-2-3√2-3=-2√3-3√2=-2×1.732-3×1.414=-3.464-4.242=-7.706≈-7.7你貌似算錯(cuò)了是1.7，謝謝你絕對(duì)正確啊