SOLUTION: I need help with this problem: Find the value of K so that x = -1 is a zero of y = {{{2x^3 + x + k}}}.

Algebra ->  Finance -> SOLUTION: I need help with this problem: Find the value of K so that x = -1 is a zero of y = {{{2x^3 + x + k}}}.      Log On


   

Question 1001742: I need help with this problem:
Find the value of K so that x = -1 is a zero of y = 2x%5E3+%2B+x+%2B+k.
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay, plug x = -1 into
2x%5E3+%2B+x+%2B+k
and set it equal to zero...we get
2(-1)^3 + (-1) + k = 0
-2 - 1 + k = 0
k = 3