SOLUTION: Keller performed the work below to express the polynomial in factored form: r(x) = x^4 - 8x^2 - 9 r(x) = (x^2 + 1)(x^2 - 9) (x) = (x + 1)(x - 1)(x + 3)(x

SOLUTION: Keller performed the work below to express the polynomial in factored form: r(x) = x^4 - 8x^2 - 9 r(x) = (x^2 + 1)(x^2 - 9) (x) = (x + 1)(x - 1)(x + 3)(x - 3) Exp

Question 1182015: Keller performed the work below to express the polynomial in factored form:
r(x) = x^4 - 8x^2 - 9
r(x) = (x^2 + 1)(x^2 - 9)
(x) = (x + 1)(x - 1)(x + 3)(x - 3)
Explain the error he made and complete the factorization correctly.
Found 2 solutions by josgarithmetic, mananth:
Answer by josgarithmetic(39628) (Show Source): You can put this solution on YOUR website!

Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!

r(x) = x^4 - 8x^2 - 9 }}}

(x^2+1) not (x+1)(x-1)

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