九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)
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![九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)](/uploads/image/z/5371026-42-6.jpg?t=%E4%B9%9D%E5%B9%B4%E7%BA%A7%E4%B8%8A%E5%86%8C%E6%95%B0%E5%AD%A6%E9%A2%98+%EF%BC%881%2B%E6%A0%B9%E5%8F%B72-%E6%A0%B9%E5%8F%B73%EF%BC%89%EF%BC%881-%E6%A0%B9%E5%8F%B72%2B%E6%A0%B9%E5%8F%B73%EF%BC%89)
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九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)
九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)
九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)
=【1+(根号2-根号3)】【1-(根号2-根号3)】
=1^2-(根号2-根号3)^2
=1-(2-2根号6+3)
=2根号6-4
(1+根号2-根号3)*(1-根号2+根号3)=2根号6-4
2倍根号6减4
=(1+(根2-根3))(1-(根2-根3))
=1-(根2-根3)的平方
=1-(2-2又跟6+3)
=-4+2根6
原式=(1+(根号2-根号3))*(1-(根号2-根号3))=1-(根号2-根号3)*(根号2-根号3)=1-2-3+2*根号6=2*根号6-4