content area top Part 1 Simplify. Assume that all variables represent positive real numbers. RootIndex 3 StartRoot 27 xy squared EndRoot plus RootIndex 3 StartRoot 64 x Superscript 4 Baseline y Superscript 5 EndRoot Question content area bottom Part 1 Select the correct choice below and fill in any answer boxes in your choice. A. RootIndex 3 StartRoot 27 xy squared EndRoot plus RootIndex 3 StartRoot 64 x Superscript 4 Baseline y Superscript 5 EndRootequals enter your response here (Simplify your answer. Type an exact answer, using radicals as needed.) B. The expression cannot be simplifed