The square below has an area of 16+8x+x216+8x+x^2 16+8x+x 2 16, plus, 8, x, plus, x, squared square meters.

Which source would provide the most bias-free information about smoking and increased health risks? a) a website created by heart disease patients b) a research study conducted by the mayo clinic eliminate c) a public service message sponsored by tobacco companies d) an online question forum conducted by attorneys for cardiac specialists