Question

If a=24,b=26,,c=28, then the value of a²+b²+c²-ab-bc-ac will be:
a) 0 b)4 c) 8 d)12​

Answer 1

Answer:

https://learn.careers360.com/latex-image/?%5Cbegin%7Barray%7D%7Bl%7D%20a%5E%7B2%7D+b%5E%7B2%7D+c%5E%7B2%7D-a%20b-b%20c-a%20c%20%5C%5C%20%3Da%28a-b%29+b%28b-c%29+c%28c-a%29%20%5C%5C%20%3D24%28-2%29+26%28-2%29+28%284%29%20%5C%5C%20%3D-48-52+112%20%5C%5C%20%3D112-100%20%5C%5C%20%3D12%20%5Cend%7Barray%7D

Answer 2

Answer:

24²+26²+28²-24×26-26×28-24×28

576+676+784-624-728-672

= 12