Question

Simplify the following expression:3[(x3 - 7 x + 1) - (x+ 4)]O A. 3x3 - 24x -9B. 3x-5x - 6C. x? - 8x-3D. 3x3 - 6x +15

Answer 1

`\begin{gathered} \text{Given} \\ 3[(x^3-7x+1)-(x+4)] \end{gathered}`
`\begin{gathered} 3[(x^3-7x+1)-(x+4)] \\ =3[x^3-7x+1-x-4] \\ =3[x^3-8x-3] \\ =3(x^3)+3(-8x)+3(-3) \\ =3x^3-24x-9 \\ \; \\ \text{Therefore,} \\ 3\left[\left(x^3\:-\:7\:x\:+\:1\right)\:-\:\left(x+\:4\right)\right]=3x^3-24x-9 \end{gathered}`