计算和化简二次根式(1)¼根号下18ab×(-2/b根号下6a²/a)(2)根号下50a²b(a<0,b>0)(3)根号18×3/2根号20×(-1/3根号15)(4)6根号27×(-2根号3)(5)2根号xy×根号下12/x
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![计算和化简二次根式(1)¼根号下18ab×(-2/b根号下6a²/a)(2)根号下50a²b(a<0,b>0)(3)根号18×3/2根号20×(-1/3根号15)(4)6根号27×(-2根号3)(5)2根号xy×根号下12/x](/uploads/image/z/8661493-37-3.jpg?t=%E8%AE%A1%E7%AE%97%E5%92%8C%E5%8C%96%E7%AE%80%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%EF%BC%881%EF%BC%89%26%23188%3B%E6%A0%B9%E5%8F%B7%E4%B8%8B18ab%C3%97%EF%BC%88-2%2Fb%E6%A0%B9%E5%8F%B7%E4%B8%8B6a%26%23178%3B%2Fa%EF%BC%89%EF%BC%882%EF%BC%89%E6%A0%B9%E5%8F%B7%E4%B8%8B50a%26%23178%3Bb%EF%BC%88a%EF%BC%9C0%2Cb%EF%BC%9E0%EF%BC%89%EF%BC%883%EF%BC%89%E6%A0%B9%E5%8F%B718%C3%973%2F2%E6%A0%B9%E5%8F%B720%C3%97%EF%BC%88-1%2F3%E6%A0%B9%E5%8F%B715%EF%BC%89%EF%BC%884%EF%BC%896%E6%A0%B9%E5%8F%B727%C3%97%EF%BC%88-2%E6%A0%B9%E5%8F%B73%EF%BC%89%EF%BC%885%EF%BC%892%E6%A0%B9%E5%8F%B7xy%C3%97%E6%A0%B9%E5%8F%B7%E4%B8%8B12%2Fx)
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计算和化简二次根式(1)¼根号下18ab×(-2/b根号下6a²/a)(2)根号下50a²b(a<0,b>0)(3)根号18×3/2根号20×(-1/3根号15)(4)6根号27×(-2根号3)(5)2根号xy×根号下12/x
计算和化简二次根式
(1)¼根号下18ab×(-2/b根号下6a²/a)
(2)根号下50a²b(a<0,b>0)
(3)根号18×3/2根号20×(-1/3根号15)
(4)6根号27×(-2根号3)
(5)2根号xy×根号下12/x
计算和化简二次根式(1)¼根号下18ab×(-2/b根号下6a²/a)(2)根号下50a²b(a<0,b>0)(3)根号18×3/2根号20×(-1/3根号15)(4)6根号27×(-2根号3)(5)2根号xy×根号下12/x
(1)¼根号下18ab×(-2/b根号下6a²/a)
=1/4×(-2/b)×√(18ab×6a²/a)
=-1/(2b)×3a√(2b)
=-3a/(2b) √(2b)
(2)根号下50a²b(a<0,b>0)
=√(25a²×2b)
=-5a√(2b)
(3)根号18×3/2根号20×(-1/3根号15)
=-1/3×3/2×√(18×20×15)
=-1/2×√5400
=-1/2×30√6
=-15√6
(4)6根号27×(-2根号3)
=6×(-2)×√(27×3)
=-12×9
=-108
(5)2根号xy×根号下12/x
=2√(xy×12/x)
=4√(3y)