一道计算题(化简)(a²+9)²-(a+3)(3-a)(a²+9)运用公式化简,
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一道计算题(化简)
(a²+9)²-(a+3)(3-a)(a²+9)运用公式化简,
(a²+9)²-(a+3)(3-a)(a²+9)运用公式化简,
![一道计算题(化简)(a²+9)²-(a+3)(3-a)(a²+9)运用公式化简,](/uploads/image/z/6471642-66-2.jpg?t=%E4%B8%80%E9%81%93%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%88%E5%8C%96%E7%AE%80%EF%BC%89%EF%BC%88a%26sup2%3B%2B9%EF%BC%89%26sup2%3B-%EF%BC%88a%2B3%EF%BC%89%EF%BC%883-a%EF%BC%89%28a%26sup2%3B%2B9%EF%BC%89%E8%BF%90%E7%94%A8%E5%85%AC%E5%BC%8F%E5%8C%96%E7%AE%80%2C)
(a²+9)²-(a+3)(3-a)(a²+9)
=(a²+9)²+(a+3)(a-3)(a²+9)
=(a²+9)²+(a²-9)(a²+9)
=(a²+9)(a²+9+a²-9)
=(a²+9)2a²
=2a^4+18a²
=(a²+9)²+(a+3)(a-3)(a²+9)
=(a²+9)²+(a²-9)(a²+9)
=(a²+9)(a²+9+a²-9)
=(a²+9)2a²
=2a^4+18a²
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