计算:(3a²+1/2b)(3a²-1/2b)(9a四次方-1/4b²)过程写清楚,
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![计算:(3a²+1/2b)(3a²-1/2b)(9a四次方-1/4b²)过程写清楚,](/uploads/image/z/109429-61-9.jpg?t=%E8%AE%A1%E7%AE%97%3A%283a%26%23178%3B%2B1%2F2b%29%283a%26%23178%3B-1%2F2b%29%289a%E5%9B%9B%E6%AC%A1%E6%96%B9-1%2F4b%26%23178%3B%29%E8%BF%87%E7%A8%8B%E5%86%99%E6%B8%85%E6%A5%9A%2C)
计算:(3a²+1/2b)(3a²-1/2b)(9a四次方-1/4b²)过程写清楚,
计算:(3a²+1/2b)(3a²-1/2b)(9a四次方-1/4b²)过程写清楚,
计算:(3a²+1/2b)(3a²-1/2b)(9a四次方-1/4b²)过程写清楚,
(3a²+1/2b)(3a²-1/2b)(9a的4次方-1/4b²)
=(9a的4次方-1/4b²)(9a的4次方-1/4b²)
=(9a的4次方-1/4b²)²
=(9a的4次方)²-2(9a的4次方)(1/4b²)+(1/4b²)²
=81a的8次方-9/2a的4次方b²+1/16b的4次方
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