Question

Question #ee927

Answer 1

`-6root(7)2+2root(7)(256)=color(red)(-2root(7)2`

Explanation:

I have assumed `root(7)(265)` was meant to be `root(7)(256)`

`256=2^8=2^7 * 2`

`color(blue)(root(7)(256))=root(7)(2^7 * 2) = root(7)(2^7) * root(7)(2)color(blue)(=2root(7)2)`

`-6root(7)2+2color(blue)(root(7)(256)`
`color(white)("XXX")=-6root(7)(2)+2*color(blue)(2root(7)(2))`

`color(white)("XXX")=-6root(7)(2)+4root(7)(2)`

`color(white)("XXX")=-2root(7)(2)`