Answer:
= 16+49 = 65
Step-by-step explanation:
The error is at the end of the first line. (-7i)(7i) = -49i² ≠ +49i².
The correct work is ...
(4-7i)(4+7i)=16+28i-28i-49i^2
= 16+49
= 65
Answer:
18 heavy equipment operators, 16 general laborers
Step-by-step explanation:
18 x 135 = $2430
16 x 94 = $1504
$2430 + $1504 = $3934, 34 workers total
Hope this helps!
Answer:
-x/x^2-1
Step-by-step explanation:
-x^2+x/x^3-x^2-x+1
x(-x+1)/(x+1)(x-1)(x-1)
-x/x^2-1