help

[onyx sluice]

substitute in x=4 to get 1 (A)
this is because of x-4 and 4-x which means that x cannot be less than for nor greater than 4, otherwise the result will be negative which isn't allowed for both square root and 4-th root
actually, negative isn't allowed for all n-th root where n is even

[thorny kraken]

@onyx sluice is it right?

[onyx sluice]

yes

[thorny kraken]

are u sure cuz my friend said i have wrong calculate on top

can u check

[onyx sluice]

the last 2 terms turns to 0
so we only need to calculate the 1st term
which is cbrt(12-4) = cbrt(8) = 2

[thorny kraken]

okay so the answer is right ?

[onyx sluice]

yes

[thorny kraken]

@thank u

[dark summit]

@thorny kraken has given 1 rep to @onyx sluice

[onyx sluice]

urwelcome