将y=(2x-1)(x+2)+1化成y=a(x+m)^2+k的形式为( )A.y=2(x+3/4)^2-25/16B.y=2(x-3/4)^2-17/8C.y=2(x+3/4)^2-17/8D.y=2(x+3/4)^2+17/8

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将y=(2x-1)(x+2)+1化成y=a(x+m)^2+k的形式为()A.y=2(x+3/4)^2-25/16B.y=2(x-3/4)^2-17/8C.y=2(x+3/4)^2-17/8D.y=2(

将y=(2x-1)(x+2)+1化成y=a(x+m)^2+k的形式为( )A.y=2(x+3/4)^2-25/16B.y=2(x-3/4)^2-17/8C.y=2(x+3/4)^2-17/8D.y=2(x+3/4)^2+17/8
将y=(2x-1)(x+2)+1化成y=a(x+m)^2+k的形式为( )
A.y=2(x+3/4)^2-25/16
B.y=2(x-3/4)^2-17/8
C.y=2(x+3/4)^2-17/8
D.y=2(x+3/4)^2+17/8

将y=(2x-1)(x+2)+1化成y=a(x+m)^2+k的形式为( )A.y=2(x+3/4)^2-25/16B.y=2(x-3/4)^2-17/8C.y=2(x+3/4)^2-17/8D.y=2(x+3/4)^2+17/8
y=2x²+3x-2+1
=2(x²+3x/2+9/16-9/16)-1
=2(x²+3x/2+9/16)-9/8-1
=2(x+3/4)²-17/8
选C

选C