计算:(a²+4b²)²-16a²b²
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计算:(a²+4b²)²-16a²b²
计算:(a²+4b²)²-16a²b²
计算:(a²+4b²)²-16a²b²
(a²+4b²)²-16a²b²
=(a²+4b²+4ab)(a²+4b²-4ab)
=(a+2b)²(a-2b)²
(a²+4b²)²-16a²b²
=(a²-4b²)²
(a²+4b²)²-16a²b²
=(a^4+8a^2*b^2+16b^4)-16a^2*b^2
=a^4-8a^2*b^2+16b^4
=(a²-4b²)²