Question

12x(x-4)-(x+1)(x^2-x+1)+(x-4)^3=(x-3)(x+1)-(x+5)^2

Answer 1

\(A=12x\left(x-4\right)-\left(x+1\right)\left(x^2-x+1\right)+\left(x-4\right)^3\)

\(=12x^2-48x-x^3-1+x^3-12x^2+48x-64\)

\(=-65\)

\(B=\left(x-3\right)\left(x+1\right)-\left(x+5\right)^2\)

\(=x^2-2x-3-x^2-10x-25\)

\(=-12x-28\)

=>-12x-28=-65

=>12x+28=65

=>12x=37

hay x=37/12