Question

B^2 -- 28b -- 192....factotize it
....

Answer 1

$b {}^{2} - 28b - 192 \\ b {}^{2} - 16b - 12b - 192 \\ b {}^{} (b - 16) - 12(b - 16) \\ (b - 12)(b - 16) \: ans$