SOLUTION: Could someone help me understand and work this problem please? Given that one zero is 1, which of the following is not a zero of f(x)? f(x)= x^3-4x^2-15x+18

Algebra ->  Functions -> SOLUTION: Could someone help me understand and work this problem please? Given that one zero is 1, which of the following is not a zero of f(x)? f(x)= x^3-4x^2-15x+18      Log On


   



Question 57301: Could someone help me understand and work this problem please?
Given that one zero is 1, which of the following is not a zero of f(x)?
f(x)= x^3-4x^2-15x+18

Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
Could someone help me understand and work this problem please?
Given that one zero is 1, which of the following
WHAT WHERE ARE THEY???ANY WAY I AM GIVING THE ZEROS ..SO REST ARE ALL NOT ZEROS
is not a zero of f(x)?
f(x)= x^3-4x^2-15x+18
1|1-4-15+18
.|0+1-3 -18
-----------------
..1-3-18+0
X^2-3X-18 IS THE QUOTIENT
=(X-6)(X+3)=0
X=6 AND - 3 ARE THE 2 OTHER ZEROS APART FROM 1....REST ARE ALL NOT ZEROS.