因式分解:(x^2+4x+6)(x^2+4x-4)+25
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因式分解:(x^2+4x+6)(x^2+4x-4)+25
因式分解:(x^2+4x+6)(x^2+4x-4)+25
因式分解:(x^2+4x+6)(x^2+4x-4)+25
(x^2+4x+1)^2
(x^2+4x+6)(x^2+4x-4)+25
=(x^2+4x+1)^2-25+25
=(x^2+4x+1)^2