y=1⼀2x的平方+x+3怎么配方?

2025-12-14 20:52:37
推荐回答(1个)
回答1:

解:y=x^2/2+x+3
=1/2(x^2+2x+1-1)+3
=1/2[(x+1)^2-1]+3
=1/2(x+1)^2-1/2+3
=1/2(x+1)^2+5/2