Question

Даю 35баллов пж ркшитк

Answer 1

$3(7x - 4) - (8x - 12) = 21x - 12 - 8x +1 2 = = 13x = 13 \times ( - 1.4) = - 18.2 \\ (x - 3) {}^{2} - 2x(x - 3) = (x - 3)(x - 3 - 2x) = (x - 3)( - x - 3) = (5 - 3)( - 5 - 3) = 2 \times ( - 8) = - 16$

$\frac{3 - x}{2} = \frac{8 - 5x}{3} \: \: \: | \times 6 \\ 3(3 - x) = 2(8 - 5x) \\ 9 - 3x = 16 - 10x \\ - 3x + 10x = 16 - 9 \\ 7x = 7 \\ x = 7 \div 7 \\ x = 1$

$y = - 5x + 3.5 \\ 3.5 = - 5 \times ( - 1.4) + 3.5 \\ 3.5 = 7 + 3.5 \\ 3.5 = 10.5$

Точка А не принадлежит графику этой функции