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

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

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