SOLUTION: Question: Solve x^4-10x^2+9=0 Possible Answers: (a) +1, +3 (b) 1, 9 (c) +1, +9 (d) none of these

Algebra ->  Algebra  -> College  -> Linear Algebra -> SOLUTION: Question: Solve x^4-10x^2+9=0 Possible Answers: (a) +1, +3 (b) 1, 9 (c) +1, +9 (d) none of these      Log On


   

Question 30243: Question:
Solve x^4-10x^2+9=0
Possible Answers:
(a) +1, +3
(b) 1, 9
(c) +1, +9
(d) none of these
Answer by checkley71(8405) About Me  (Show Source):
You can put this solution on YOUR website!
X~4-10X~2+9=0 OR (X~2-9)(X~2-1)=0 OR (X-3)(X+3)(X-1)(X+1)=0 OR X=+/-3 & X=+/-1.
Ans. (d) none of the above.