Factoring
Source:
February 7, 2009
Problem Statement
The factors of x^4\plus{}64 are:
(A)\ (x^2\plus{}8)^2 \qquad
(B)\ (x^2\plus{}8)(x^2\minus{}8) \qquad
(C)\ (x^2\plus{}2x\plus{}4)(x^2\minus{}8x\plus{}16) \\
(D)\ (x^2\minus{}4x\plus{}8)(x^2\minus{}4x\minus{}8) \qquad
(E)\ (x^2\minus{}4x\plus{}8)(x^2\plus{}4x\plus{}8)