All of the following are quadratic equation except
a). y=x^2 3x
b). y=4(x 2)
c). y=8x^2-5
d). y=x(x 1)?
sloppy notation, let me fix it for you
a). y= (x^2)(3x)
b). y=4(x^2)
c). y=8x^2 - 5
d). y=x(x^1)
after simplifying, which does NOT contain x^2 as its highest power term?