- 23 and - 24
note that negative numbers are smaller than positive numbers.
The 2 negative numbers in the list are - 23 and - 24
and their sum = - 23 + (- 24 ) = - 23 - 24 = - 47
x=(13±3√17)/2x
≈ 12.68465843, 0.31534156
Which would be 12.7 and 0.3 If you rounded to the nearest tenth.
Answer:
0.000052
1 nanometer = .000000001 meters
.000000001 x 52000 = 0.000052