ax的3次方-(2a-1)x平方–(a+1)x+2a-2
1个回答
关注
展开全部
ax³-(2a-1)x²-(a+1)x+2a-2=ax³-2ax²+x²-ax-x+2a-2=ax³-2ax²+ax-ax+x²-ax-x+2a-2=ax(x²-2x+1)+x²-2ax-x+2a-2=ax(x²-2x+1)+x²-2ax+a²-a²-x+2a-2=ax(x²-2x+1)+(x-a)²-x-(a²-2a+1+1)=ax(x²-2x+1)+(x-a)²-x-(a-1)²+1=ax(x-1)²+(x-a)²-x-(a-1)²+1
咨询记录 · 回答于2023-07-15
ax的3次方-(2a-1)x平方–(a+1)x+2a-2
是求什么
ax³-(2a-1)x²-(a+1)x+2a-2
老师因式分解呢
ax³-(2a-1)x²-(a+1)x+2a-2=ax³-2ax²+x²-ax-x+2a-2=ax³-2ax²+ax-ax+x²-ax-x+2a-2=ax(x²-2x+1)+x²-2ax-x+2a-2=ax(x²-2x+1)+x²-2ax+a²-a²-x+2a-2=ax(x²-2x+1)+(x-a)²-x-(a²-2a+1+1)=ax(x²-2x+1)+(x-a)²-x-(a-1)²+1=ax(x-1)²+(x-a)²-x-(a-1)²+1