Respuesta :

VenusRetrograde
Answer=C

4(3x^2+6x)
can be simplified to...
12x^2+24x

To find out which expression isn't equivalent, you have to simplify them...

a=12x^x+24x

b=2x(6x+12)
b=12x^2+24x

c=6x(2x^2+4x)
c=12x^3+24x