Question

1. a2/b2-1 при а =-3 b =-2

2. 5c+1/4b-1 при с=2,8 d=-2

3. 5+2m /2-4n при m=-1,5

n=-3/4

Answer 1

$1) \frac{( - 3) {}^{2} }{( - 2) {}^{2} } - 1 = \frac{9}{4} - 1 = 2 \frac{1}{4} - 1 = \\ = 1 \frac{1}{4}$
$5 \times 2 + \frac{1}{4} \times ( - 2) - 1 = \\ 10 - \frac{1}{2} - 1 = 10 - 0.5 - 1 = \\ = 8.5$

$5 + \frac{2 \times ( - 1.5)}{2 - 4 \times ( - \frac{3}{4}) } = 5 + \frac{( - 3)}{5} \\ = 5 - 0.6 = 4.4$