Hi,
(4x−2)(3x^2−2x+1)
=(4x+−2)(3x^2+−2x+1)
=(4x)(3x2)+(4x)(−2x)+(4x)(1)+(−2)(3x2)+(−2)(−2x)+(−2)(1)
=12x3−8x^2+4x−6x^2+4x−2
=12x3−14x2+8x−2
Have a great day!
