计算;1、(3根号2-2根号3)²-(3根号2+2根号3)²2、a根号b-根号下a²b+b根号下a²/b-ab/根号b
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![计算;1、(3根号2-2根号3)²-(3根号2+2根号3)²2、a根号b-根号下a²b+b根号下a²/b-ab/根号b](/uploads/image/z/1857394-10-4.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9B1%E3%80%81%EF%BC%883%E6%A0%B9%E5%8F%B72-2%E6%A0%B9%E5%8F%B73%EF%BC%89%26%23178%3B-%EF%BC%883%E6%A0%B9%E5%8F%B72%2B2%E6%A0%B9%E5%8F%B73%EF%BC%89%26%23178%3B2%E3%80%81a%E6%A0%B9%E5%8F%B7b-%E6%A0%B9%E5%8F%B7%E4%B8%8Ba%26%23178%3Bb%2Bb%E6%A0%B9%E5%8F%B7%E4%B8%8Ba%26%23178%3B%2Fb-ab%2F%E6%A0%B9%E5%8F%B7b)
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计算;1、(3根号2-2根号3)²-(3根号2+2根号3)²2、a根号b-根号下a²b+b根号下a²/b-ab/根号b
计算;1、(3根号2-2根号3)²-(3根号2+2根号3)²
2、a根号b-根号下a²b+b根号下a²/b-ab/根号b
计算;1、(3根号2-2根号3)²-(3根号2+2根号3)²2、a根号b-根号下a²b+b根号下a²/b-ab/根号b
1、(3根号2-2根号3)²-(3根号2+2根号3)²
=【(3根号2-2根号3)+(3根号2+2根号3)】*【(3根号2-2根号3)-(3根号2+2根号3)】
=6根号2*(-4根号3)
=-24根号6
2、a根号b-根号下a²b+b根号下a²/b-ab/根号b
=a根号b - |a|*根号b + |a|*根号b - a根号b
=0
1、六根号二减四根号三
2、0
1、利用平方差公式计算得
(3根号2-2根号3+3根号2+2根号3)(3根号2-2根号-3根号2-2根号3)
=6根号2*(-4根号3)
=-24根号6
2、原式=根号下a平方b-根号下+根号下a平方b-根号下a平方b
=0