计算 √12-2+√3)º+1/(2+√3 )1)√12-2+√3)º+1/(2+√3)2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²3)2a√(3a/x)·3ax·√(4x²/5a²)4)9√45÷3√1/5×3/2√8/3要过
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![计算 √12-2+√3)º+1/(2+√3 )1)√12-2+√3)º+1/(2+√3)2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²3)2a√(3a/x)·3ax·√(4x²/5a²)4)9√45÷3√1/5×3/2√8/3要过](/uploads/image/z/445404-12-4.jpg?t=%E8%AE%A1%E7%AE%97+%E2%88%9A12-2%2B%E2%88%9A3%EF%BC%89%26%23186%3B%2B1%2F%EF%BC%882%2B%E2%88%9A3+%EF%BC%891%EF%BC%89%E2%88%9A12-2%2B%E2%88%9A3%EF%BC%89%26%23186%3B%2B1%2F%EF%BC%882%2B%E2%88%9A3%EF%BC%892%EF%BC%89%EF%BC%881%2B%E2%88%9A2%EF%BC%89%26%23178%3B%EF%BC%881%2B%E2%88%9A3%EF%BC%89%26%23178%3B%EF%BC%881-%E2%88%9A2%EF%BC%89%26%23178%3B%EF%BC%881-%E2%88%9A3%EF%BC%89%26%23178%3B3%EF%BC%892a%E2%88%9A%EF%BC%883a%2Fx%EF%BC%89%C2%B73ax%C2%B7%E2%88%9A%EF%BC%884x%26%23178%3B%2F5a%26%23178%3B%EF%BC%894%EF%BC%899%E2%88%9A45%C3%B73%E2%88%9A1%2F5%C3%973%2F2%E2%88%9A8%2F3%E8%A6%81%E8%BF%87)
计算 √12-2+√3)º+1/(2+√3 )1)√12-2+√3)º+1/(2+√3)2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²3)2a√(3a/x)·3ax·√(4x²/5a²)4)9√45÷3√1/5×3/2√8/3要过
计算 √12-2+√3)º+1/(2+√3 )
1)√12-2+√3)º+1/(2+√3)
2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²
3)2a√(3a/x)·3ax·√(4x²/5a²)
4)9√45÷3√1/5×3/2√8/3
要过程
第三题 那个点 是 乘号
计算 √12-2+√3)º+1/(2+√3 )1)√12-2+√3)º+1/(2+√3)2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²3)2a√(3a/x)·3ax·√(4x²/5a²)4)9√45÷3√1/5×3/2√8/3要过
题目有点不规范啊.
凑合着看了.
等会把题目改正确点额.
1)√12-2+√3)º+1/(2+√3)
=1+(2-√3)/[(2+√3)(2-√3)]
=1+(2-√3)/[4-3]
=1+2-√3
=3-√3
2)(1+√2)²(1+√3)²(1-√2)²(1-√3)²
=(1+√2)²(1-√2)²(1+√3)²(1-√3)²
=[(1+√2)(1-√2)]²[(1+√3)(1-√3)]²
=(1-2)²(1-3)²
=1×4
=4
3)2a√(3a/x)·3ax·√(4x²/5a²)
=2a√(9a²)√(4x²/5a²)
=2a·3|a|·2√5|x| / 5|a|
=12√5a|x|/5
4)9√45÷3√1/5×3/2√8/3
=(9÷3×3/2)×√(45÷1/5×8/3)
=9/2×√600
=45√6