计算与化简:(2)(2x+1)(2x-3)-(2x-3)²;(3)立方根号-27-根号9+(根号5)²
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计算与化简:(2)(2x+1)(2x-3)-(2x-3)²;(3)立方根号-27-根号9+(根号5)²
计算与化简
计算与化简
![计算与化简:(2)(2x+1)(2x-3)-(2x-3)²;(3)立方根号-27-根号9+(根号5)²](/uploads/image/z/6260138-26-8.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8E%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%882%EF%BC%89%EF%BC%882x%2B1%EF%BC%89%EF%BC%882x-3%29-%282x-3%29%26sup2%3B%EF%BC%9B%EF%BC%883%EF%BC%89%E7%AB%8B%E6%96%B9%E6%A0%B9%E5%8F%B7-27-%E6%A0%B9%E5%8F%B79%2B%EF%BC%88%E6%A0%B9%E5%8F%B75%EF%BC%89%26sup2)
计算与化简:
(2)(2x+1)(2x-3)-(2x-3)²
=(2x-3)(2x+1-2x+3)
=(2x-3)*4
=8x-12
(3)立方根号-27-根号9+(根号5)²
=[(-27-根号9+(根号5)²]^1/3
=[-27-3+5]^1/3
=[-25]^1/3
(2)(2x+1)(2x-3)-(2x-3)²
=(2x-3)(2x+1-2x+3)
=(2x-3)*4
=8x-12
(3)立方根号-27-根号9+(根号5)²
=[(-27-根号9+(根号5)²]^1/3
=[-27-3+5]^1/3
=[-25]^1/3
计算与化简:(2)(2x+1)(2x-3)-(2x-3)²;(3)立方根号-27-根号9+(根号5)²
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