Question

1.将下列各式化为a(x+m)^2+n的形式.

Answer 1

一.1.x^2+5x+1 =(x+5/2)^2-21/4

2.0.2x^2-x+3=0.2(x-2.5)^2+7/4

3.-3x^2-6x+1=-3(x+1)^2+4

4.2/3x^2+1/3y-2=2/3(x+0.25)^2-49/24

二,A-B=x^2-2x+3=(x-1)^2+2 >0

∴A>B