计算下面的题,(1).√40-2√0.1+√90 (2).2√20+2/5√125+10√0.05-6√5 (3).(√2+√3)(√8-√12)=____ (4).7/3-√2=___
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![计算下面的题,(1).√40-2√0.1+√90 (2).2√20+2/5√125+10√0.05-6√5 (3).(√2+√3)(√8-√12)=____ (4).7/3-√2=___](/uploads/image/z/5539364-44-4.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E7%9A%84%E9%A2%98%2C%281%29.%E2%88%9A40-2%E2%88%9A0.1%2B%E2%88%9A90+%282%29.2%E2%88%9A20%2B2%2F5%E2%88%9A125%2B10%E2%88%9A0.05-6%E2%88%9A5+%283%29.%28%E2%88%9A2%2B%E2%88%9A3%29%28%E2%88%9A8-%E2%88%9A12%29%3D____+%284%29.7%2F3-%E2%88%9A2%3D___)
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计算下面的题,(1).√40-2√0.1+√90 (2).2√20+2/5√125+10√0.05-6√5 (3).(√2+√3)(√8-√12)=____ (4).7/3-√2=___
计算下面的题,
(1).√40-2√0.1+√90 (2).2√20+2/5√125+10√0.05-6√5 (3).(√2+√3)(√8-√12)=____ (4).7/3-√2=___
计算下面的题,(1).√40-2√0.1+√90 (2).2√20+2/5√125+10√0.05-6√5 (3).(√2+√3)(√8-√12)=____ (4).7/3-√2=___
(1)=2√10-√10/5+3√10=(24√10)/5
(2)=4√5+2√5/125+√5-6√5=(123√5)/125
(3)=(√2+√3)(2√2-2√3)=-2
(4)=7(3+√2)/[(3-√2)(3+√2)]=7(3+√2)/(9-2)=3+√2