Simplification of Radicals
Source:
June 8, 2009
LaTeXabsolute value
Problem Statement
If y \equal{} \sqrt{x^2 \minus{} 2x \plus{} 1} \plus{} \sqrt{x^2 \plus{} 2x \plus{} 1}, then is:
(A)\ 2x\qquad
(B)\ 2(x \plus{} 1)\qquad
(C)\ 0\qquad
(D)\ |x \minus{} 1| \plus{} |x \plus{} 1|\qquad
(E)\ \text{none of these}