已知一元二次方程x2﹣8x+12=0的两个解恰好是等腰△ABC的底边长和腰长,则△ABC的周长为( )
A. It's in front of the TV.
B. Thank you!
C. No, there aren't.
D. There is a ball and a big bed.
E. I can sing and dance
下列函数中,是一次函数的有( )(1)y=πx (2)y=2x-1 (3)y=1x(4)y=2-3x (5)y=x2-1.