Given z equals quantity 5 plus 9 times I end quantity over quantity 6 minus 2 times I end quantity comma what is z in standard form? negative 3 over 2 minus 27 over 16 times i negative 3 over 10 minus 8 over 5 times i 3 over 10 plus 8 over 5 times i 3 over 2 plus 27 over 16 times i