(根号2+根号3+根号5)*(3根号2+2根号3-根号30)最好用文字表述.符号我看不懂
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![(根号2+根号3+根号5)*(3根号2+2根号3-根号30)最好用文字表述.符号我看不懂](/uploads/image/z/4527403-43-3.jpg?t=%EF%BC%88%E6%A0%B9%E5%8F%B72%2B%E6%A0%B9%E5%8F%B73%2B%E6%A0%B9%E5%8F%B75%EF%BC%89%2A%EF%BC%883%E6%A0%B9%E5%8F%B72%2B2%E6%A0%B9%E5%8F%B73-%E6%A0%B9%E5%8F%B730%EF%BC%89%E6%9C%80%E5%A5%BD%E7%94%A8%E6%96%87%E5%AD%97%E8%A1%A8%E8%BF%B0.%E7%AC%A6%E5%8F%B7%E6%88%91%E7%9C%8B%E4%B8%8D%E6%87%82)
(根号2+根号3+根号5)*(3根号2+2根号3-根号30)最好用文字表述.符号我看不懂
(根号2+根号3+根号5)*(3根号2+2根号3-根号30)最好用文字表述.符号我看不懂
(根号2+根号3+根号5)*(3根号2+2根号3-根号30)最好用文字表述.符号我看不懂
(根号2+根号3+根号5)*(3根号2+2根号3-根号30)=(根号2+根号3+根号5)*(根号2+根号3-根号5)*(根号2*根号3)=[(根号2+根号3)²-5]*(根号2*根号3)=2*(根号2*根号3)*(根号2*根号3)
=2*2*3=12.
就按死办法算就可以求解。
一项一项×进去
根号2*(3根号2+2根号3-根号30)+根号3*(3根号2+2根号3-根号30)+根号5*(3根号2+2根号3-根号30)
=根号2×3根号2+根号2×2根号3-根号2×根号30+根号3×3根号2+根号3×2根号3-根号3×根号30+根号5×3根号2+根号5×2根号3-根号5×根号30
=6+2根号6-2根号15+3根号6...
全部展开
就按死办法算就可以求解。
一项一项×进去
根号2*(3根号2+2根号3-根号30)+根号3*(3根号2+2根号3-根号30)+根号5*(3根号2+2根号3-根号30)
=根号2×3根号2+根号2×2根号3-根号2×根号30+根号3×3根号2+根号3×2根号3-根号3×根号30+根号5×3根号2+根号5×2根号3-根号5×根号30
=6+2根号6-2根号15+3根号6+6-3根号10+3根号10+2根号15-5根号6
=12
收起
(根号2+根号3+根号5)*(3根号2+2根号3-根号30)
=3*(根号2)的平方+2根号2*根号3-根号2*根号30+根号3*3根号2+根号3*2根号3
-根号3*根号30+根号5*(3根号2+2根号3)-根号5*根号30
=6+2根号6-2根号15+3根号6+6-3根号10+3根号10+2根号15-5根号6
=12