Question

solve 3x^3-4x=1
please explain step by step please ;__;

Answer 1

first subtract 1 from both sides

\[\large \implies 3x^3 - 4x - 1 = 0\]
now you find factors for this

are you familiar with the factor theorem?

Answer 2

i can't factor with ^3 :(

Answer 3

do u know a technique where u can find whether (x+1) and/or (x-1) is a factor of given polynomial ?

Answer 4

nope

Answer 5

add coefficient of odd terms
add coefficient of even terms
what u get?

Answer 6

if u get those equal,then x+1 is factor
if coefficient of odd terms+coefficient of even terms=0, then x-1 is factor

Answer 7

so would it be (x+1) .?

Answer 8

yup,now can u divide your polynomial with x+1
to get a quadratic equation,that u can solve.

Answer 9

OH OK I GOT IT