15问答网 > {(x+2)(x-2)}的平方是多少?

{(x+2)(x-2)}的平方是多少?

我的是结果是X的4次方-16X +16 不知道是否正确?要过程,谢谢
2025-03-04 20:52:41
推荐回答（5个）
回答1：

应该是
[(x+2)(x-2)]²=(x²-4)²=x四次方-8x²+16

回答2：

第一步的X的平方—4
（X平方—4）的平方为X的4次方—8（4+4）X的平方+16 。

回答3：

原式=（X平方-4）平方= X4次方-8X平方+16

回答4：

先平方差然后再差的平方

原式=（x^2-4)^2=x^4-8x^2+16

回答5：

＝X4次方减去8X平方加上16

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