SOLUTION: Factor the polynomial, if possible X^4-81 i put on my answer sheet online (x^2-9)(x^2+9) and t says incorreect the i factor that to (x^2+9)(x-3)(x+3) and it still says in

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factor the polynomial, if possible X^4-81 i put on my answer sheet online (x^2-9)(x^2+9) and t says incorreect the i factor that to (x^2+9)(x-3)(x+3) and it still says in      Log On


   

Question 103777This question is from textbook beginning and intermediate algebra
: Factor the polynomial, if possible
X^4-81

i put on my answer sheet online (x^2-9)(x^2+9) and t says incorreect the i factor that to (x^2+9)(x-3)(x+3) and it still says incorrect ????????


This question is from textbook beginning and intermediate algebra

Found 2 solutions by edjones, scott8148:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
(x^2+9)(x-3)(x+3) is correct.
Ed

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
do you use complex numbers? the sum of squares does factor but the results are imaginary numbers

x^2+9=(x+3i)(x-3i)