1) [tex]-8x^2\left(x+8\right)=8\left(2+6\right)[/tex]
[tex]-8x^3-64x^2=64[/tex]
[tex]-8x^3-64x^2-64=64-64[/tex]
[tex]-8x^3-64x^2-64=0[/tex]
[tex]-8x^2+0.97035\dots x-7.88051\dots \approx \:0[/tex]
[tex]x\approx \:-8.12129\dots[/tex]
2) [tex]4n+\frac{3}{2}=2n-\frac{5}{1}[/tex]
[tex]4n+\frac{3}{2}=2n-5[/tex]
[tex]4n+\frac{3}{2}-\frac{3}{2}=2n-5-\frac{3}{2}[/tex]
[tex]4n=2n-\frac{13}{2}[/tex]
[tex]4n-2n=2n-\frac{13}{2}-2n[/tex]
[tex]2n=-\frac{13}{2}[/tex]
[tex]\frac{2n}{2}=\frac{-\frac{13}{2}}{2}[/tex]
[tex]n=-\frac{13}{4}[/tex]
