if x+1/x = - 1 then What is the value of x^3-1 ? a) 1 , b) -1 , c) 0 ,d)2
Answers
Answered by
3
Step-by-step explanation:
x²+1=-x
x²+x+1=0
x(x+1)+1=0
x=-1
x³-1
(-1)³-1=-1-1=-2 OK friend
Similar questions