Question

-8x2(x+8)=8(2+6) how do i solve this and 4n+3/2=2n-5/1?

Answer 1

1)
`-8x^2\left(x+8\right)=8\left(2+6\right)`

`-8x^3-64x^2=64`

`-8x^3-64x^2-64=64-64`

`-8x^3-64x^2-64=0`

`-8x^2+0.97035\dots x-7.88051\dots \approx \:0`

`x\approx \:-8.12129\dots`

2)
`4n+(3)/(2)=2n-(5)/(1)`

`4n+(3)/(2)=2n-5`

`4n+(3)/(2)-(3)/(2)=2n-5-(3)/(2)`

`4n=2n-(13)/(2)`

`4n-2n=2n-(13)/(2)-2n`

`2n=-(13)/(2)`

`(2n)/(2)=(-(13)/(2))/(2)`

`n=-(13)/(4)`