Question

17.
Ifa= 2012, b= 2011, c= 2010 then the value of
a² + b² + c² -ab -bc- ca is :
(A)0
(B)2012
(C)3
(D)4024​

Answer 1

Answer:

0

Step-by-step explanation:

because it is the correct answer

Answer 2

Answer:

Given

a = 2012

b = 2011

c = 2010

a² - b² - c² - ab - bc - ca

(2012)² - (2011)² - (2010)² - 2012.2011 - 2011.2010 - 2010.2012

4048144 - 4044121 - 4040100 - 4046132 - 4042110 - 4044120

4023 - 8086232 - 8086230

4023 - 2

4021

.......OR......

4023 - ( -2 )

4023 + 2

4025

But we could not get 4024

So option D ) ☑️☑️☑️