Question

помогите даю 20 балов мне срочно

Answer 1

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