初三数学计算√12-2+√3)º+1/(2+√3)(1+根号2)²(1+根号3)²(1-根号2)²(1-根号3)²第一题题目错了根号12-(2+根号3)º+1/(2+根号3)
2019-06-02
初三数学计算√12-2+√3)º+1/(2+√3)
(1+根号2)²(1+根号3)²(1-根号2)²(1-根号3)²
第一题题目错了
根号12-(2+根号3)º+1/(2+根号3)
优质解答
解
√12-(2+√3)^0+1/(2+√3)
=2√3-1+(2-√3)/(4-3)
=2√3-1+2-√3
=√3+1
(1+√2)²(1+√3)²(1-√2)²(1-√3)²
=[(1+√2)(1-√2)]²[(1+√3)(1-√3)]²
=(1-2)²(1-3)²
=1×4
=4
解
√12-(2+√3)^0+1/(2+√3)
=2√3-1+(2-√3)/(4-3)
=2√3-1+2-√3
=√3+1
(1+√2)²(1+√3)²(1-√2)²(1-√3)²
=[(1+√2)(1-√2)]²[(1+√3)(1-√3)]²
=(1-2)²(1-3)²
=1×4
=4