Question

what isthe x in x^3-75x-182=0

Answer 1

x is the independent variable, its an unknown number or the input into a function

Answer 2

oh wait you mean solve for x

Answer 3

yes sir

Answer 4

you have to try to factor out some (x-c) where c is factor of 182 then it will leave a quadratic which is more easily solved.
try (x +-1), (x+-2),(x+-7) and see if any of those factor out evenly, if none do then you have to try other numerical methods like newton's method for finding zeroes.
Additionally, if you have a graphing calculator or software to graph the function this should give you an idea of where the zeroes are

Answer 5

x+7 does work