Question

Вычислите:
1,7²-0,8²
___________
0,18-1,5*0,18

Answer 1

2.89-0.64 -------------- 0.18-0.27 2.25 -------- = -25 -0.09

Answer 2

$frac{ 1,7^{2} - 0,8^{2}}{0,18-1,5*0,18} = frac{(1,7-0,8)(1,7+0,8)}{0,18(1-1,5)} =$ $frac{0,9*2,5}{0,18*(-0,5)} = -frac{1*5}{2*1} =-2,5$