(2根号2+3)^2005次方乘以(2根号2-3)^2006次方
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(2根号2+3)^2005次方乘以(2根号2-3)^2006次方
![(2根号2+3)^2005次方乘以(2根号2-3)^2006次方](/uploads/image/z/1431836-44-6.jpg?t=%282%E6%A0%B9%E5%8F%B72%2B3%29%5E2005%E6%AC%A1%E6%96%B9%E4%B9%98%E4%BB%A5%282%E6%A0%B9%E5%8F%B72-3%29%5E2006%E6%AC%A1%E6%96%B9)
(2根号2+3)^2005次方乘以(2根号2-3)^2006次方
=(2根号2+3)^2005次方乘以(2根号2-3)^2005次方×(2√2-3)
=[(2根号2+3)乘以(2根号2-3)]^2005次方×(2√2-3)
=[8-9]^2005次方×(2√2-3)
=3-2√2
=(2根号2+3)^2005次方乘以(2根号2-3)^2005次方×(2√2-3)
=[(2根号2+3)乘以(2根号2-3)]^2005次方×(2√2-3)
=[8-9]^2005次方×(2√2-3)
=3-2√2
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