Answer:
The right answer is [tex]4x^{3}-4x^{2}+8x-4[/tex]
The error is in the coefficient of [tex]x^{2}[/tex] and the coefficients of x
Step-by-step explanation:
[tex](4x^{3}+4x^{2}-8x) - (8x^{2}-16x+4)[/tex]
[tex]=4x^{3}+4x^{2}-8x-8x^{2}+16x-4[/tex] ⇒ collect the like terms
[tex]=4x^{3}-4x^{2}+8x-4[/tex]
The error in two terms:
[tex]12x^{2}[/tex] ⇒ must be [tex]-4x^{2}[/tex]
-24x ⇒ must be 8x
