Question

2 задания. Тренировочный ГВЭ, 9й класс

Answer 1

$2 \times ( \frac{1}{2} ) {}^{2} - 9 \times \frac{1}{2} = 2 \times \frac{1}{4} - \frac{9}{2} = \frac{2}{4} - \frac{9}{2 } = \frac{1}{2} - \frac{9}{2} = \frac{8}{2} = 4$

$1 - 2(5 - 2x) = x - 3 \\ 1 - 10 + 4x = x - 3 \\ 4x - x = - 3 + 9 \\ 3x = 6 \\ x = 6 \div 3 \\ x = 2$