Urč hodnotu výrazu bc ⋅ (9c – 5b) – [(c – b2) ⋅ (c + 2bc – 2) + c2] pre \( \large b=\frac12;c=\frac34 \)
\( \large=\frac{{43}}{{32}} \)
\( \large=\frac{{41}}{{32}} \)
\( \large=\frac{{39}}{{32}} \)
\( \large=\frac{{41}}{{34}} \)