Question

if f(x)=x^3-8x+10 then find the value of x for which f(x)=pii

Answer 1

start by subtracting pi fom f(x) so that 0=x^3-8x+10-pi

Answer 2

then maybe use the cubic formula which you need to google because it is a long one

Answer 3

ok i will because i let pi to be 22/7 and multiplied though by seven

Answer 4

which gave me 7x^3-56x+48=0 but i couldnt have a factor

Answer 5

i will try the cubic formular

Answer 6

this actually isn't to bad to solve with the cubic formula since the coefficient of x^2 is 0
http://www.math.vanderbilt.edu/~schectex/courses/cubic/

Answer 7

with "b" in the formula at zero most of the equation disappears