计算:(x²-2x+3)*(x²+2x+3)要过程
问题描述:
计算:(x²-2x+3)*(x²+2x+3)要过程
答
(x²-2x+3)*(x²+2x+3)
=[(x²+3)+2x]*[(x²+3)-2x]
=(x²+3)²-4X²
=X4+6X²+9-4X²
=X4+2X²+9