Question

12а²-12ах-7а+7х якщо а=1⅙,х=⅔Помогите срочно Кр пожалуста​

Answer 1

$12a ^{2} - 12ax - 7a + 7x = \\ 12a(a - x) - 7(a - x) = \\ (a - x)(12a - 7) = \\ a = 1 \frac{1}{6} .x = \frac{2}{3} \\ (1 \frac{1}{6} - \frac{2}{3} )(12 \times 1 \frac{1}{6} - 7) = \\ 1 \frac{1}{6} - \frac{2}{3} = 1 \frac{1 - 4}{6} = \frac{3}{6} = \frac{1}{2} \\ 12 \times \frac{7}{6} - 7 = 14 - 7 = 7 \\ \frac{1}{2} \times 7 = \frac{7}{2} = 3 \frac{1}{2} = 3.5$