Question

if a=62,b =66,c=68 then find value of a²+b²+c²-ab-bc-ca​

Answer 1

Answer:

Given that

a=62

b=66

c=68

To Find

a2+b2+c2-ab-bc-ca

Solution

a2=62×62=3844

b2=66x66=4356

c2=68x68=4624

ab=62x66=4092

bc=66x68=4488

ca=68x62=4216

Now Lets put all Together

a2+b2+c2-ab-bc-ca

or3844+4356+4624-4092-4488-4216

or12824-12796

=28