计算:(1)(a-1)(a+1)(a平方+1) (2)(2a-3b)(2a+3b)(4a平方-9b平方)
问题描述:
计算:(1)(a-1)(a+1)(a平方+1) (2)(2a-3b)(2a+3b)(4a平方-9b平方)
答
:(1)(a-1)(a+1)(a平方+1) =(a²-1)(a²+1)=a^4-1(2)(2a-3b)(2a+3b)(4a平方-9b平方) =(4a²-9b²)(4a²-9b²) =16a^4-72a²b²+81b^4