计算1、4x²=81 2、5(x-2)²-245=0 3、(x-1)³+27=04、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|
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![计算1、4x²=81 2、5(x-2)²-245=0 3、(x-1)³+27=04、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|](/uploads/image/z/188131-67-1.jpg?t=%E8%AE%A1%E7%AE%971%E3%80%814x%26%23178%3B%3D81+2%E3%80%815%EF%BC%88x-2%29%26%23178%3B-245%3D0+3%E3%80%81%EF%BC%88x-1%EF%BC%89%26%23179%3B%2B27%3D04%E3%80%81%EF%BC%88-%E6%A0%B9%E5%8F%B73%EF%BC%89%26%23178%3B-%E6%A0%B9%E5%8F%B7%EF%BC%88-4%EF%BC%89%26%23178%3B--%EF%BC%88-8%E7%9A%84%E7%AB%8B%E6%96%B9%E6%A0%B9%EF%BC%89-%7C1-%E6%A0%B9%E5%8F%B72%7C)
计算1、4x²=81 2、5(x-2)²-245=0 3、(x-1)³+27=04、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|
计算1、4x²=81 2、5(x-2)²-245=0 3、(x-1)³+27=0
4、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|
计算1、4x²=81 2、5(x-2)²-245=0 3、(x-1)³+27=04、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|
1、4x²=81
x²=81/4
x=9/2 x=-9/2
2、5(x-2)²-245=0
(x-2)²=49
x-2=7 x-2=-7
x=9 x=-5
3、(x-1)³+27=0
(x-1)³=-27
x-1=-3
x=-2 4、(-根号3)²-根号(-4)²--(-8的立方根)-|1-根号2|=3-4-(-2)-(√ 2-1)=2-√2
1 X=9/2
2 X=9或-5
3 X=-2
4 =4-根号2
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