①已知a^2+b^2-4a-2b+5=0,则[根号(ab^3)+根号(a^3b)-ab]÷根号(ab)的值为_____②多项式4x^2-(k-1)x+9是一个完全平方式,则k=_____(我算的是13)③计算2根号3÷(1/根号6+1/根号2)=_____(我算的是6根号2+2根号6)我
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![①已知a^2+b^2-4a-2b+5=0,则[根号(ab^3)+根号(a^3b)-ab]÷根号(ab)的值为_____②多项式4x^2-(k-1)x+9是一个完全平方式,则k=_____(我算的是13)③计算2根号3÷(1/根号6+1/根号2)=_____(我算的是6根号2+2根号6)我](/uploads/image/z/11725788-12-8.jpg?t=%E2%91%A0%E5%B7%B2%E7%9F%A5a%5E2%2Bb%5E2-4a-2b%2B5%3D0%2C%E5%88%99%5B%E6%A0%B9%E5%8F%B7%28ab%5E3%29%2B%E6%A0%B9%E5%8F%B7%28a%5E3b%29-ab%5D%C3%B7%E6%A0%B9%E5%8F%B7%28ab%29%E7%9A%84%E5%80%BC%E4%B8%BA_____%E2%91%A1%E5%A4%9A%E9%A1%B9%E5%BC%8F4x%5E2-%28k-1%29x%2B9%E6%98%AF%E4%B8%80%E4%B8%AA%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%BC%8F%2C%E5%88%99k%3D_____%EF%BC%88%E6%88%91%E7%AE%97%E7%9A%84%E6%98%AF13%EF%BC%89%E2%91%A2%E8%AE%A1%E7%AE%972%E6%A0%B9%E5%8F%B73%C3%B7%281%2F%E6%A0%B9%E5%8F%B76%2B1%2F%E6%A0%B9%E5%8F%B72%29%3D_____%EF%BC%88%E6%88%91%E7%AE%97%E7%9A%84%E6%98%AF6%E6%A0%B9%E5%8F%B72%2B2%E6%A0%B9%E5%8F%B76%EF%BC%89%E6%88%91)
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