y= -1/2x^2+2x-1化为y=a(x-H)^2+K的形式
问题描述:
y= -1/2x^2+2x-1化为y=a(x-H)^2+K的形式
答
y= -1/2x^2+2x-1=-1/2(x^2-4x+4-4)-1=-1/2(x^2-4x+4)+2-1=-1/2(x-2)^2+1
y= -1/2x^2+2x-1化为y=a(x-H)^2+K的形式
y= -1/2x^2+2x-1=-1/2(x^2-4x+4-4)-1=-1/2(x^2-4x+4)+2-1=-1/2(x-2)^2+1