Question

2 задания. Тренировочный ГВЭ, 9й класс

Answer 1

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

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