数字在后面代表次方.因式分解p4-7p2+1 和 x4+4x2+3x+4

问题描述:

数字在后面代表次方.
因式分解p4-7p2+1 和 x4+4x2+3x+4

p4-7p2+1=p^4-7p²+1=p^4+2p²-2p²-7p²+1=p^4+2p²+1-9p²=(p²+1)²-(3p)²=(p²+1+3p)(p²+1-3p) =(p²+3p+1)(p²-3p+1) x4+4x2+3x+4 =x^4+4x²+3x+4=...