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

(x²-2x+3)(x²+2x+3)
=(x²+3)²-4x²

(x²-2x+3)*(x²+2x+3)
=[(x²+3)+2x]*[(x²+3)-2x]
=(x²+3)²-4X²
=X4+6X²+9-4X²
=X4+2X²+9