Question

помогите даю 20 балов мне срочно

Answer 1

$(8 {a}^{2} - 8ab) - (5a - 5b) = 8a(a - b) - 5(a - b) = (8a - 5)(a - b) = (8 \times \frac{1}{8} - 5)( \frac{1}{8} - ( - \frac{3}{4} )) = - 4 \times \frac{7}{8} = - \frac{7}{2} = - 3 \frac{1}{2}$