What is the value of $a^2+b^2+c^2-2 a b-2 b c+2 c a ?$
Answer & explanation
Correct answer: option 2
We have the direct formula =
$(a-b+c)^2$ = $a^2+b^2+c^2-2 a b-2 b c+2 c a $
What is the value of $a^2+b^2+c^2-2 a b-2 b c+2 c a ?$
Correct answer: option 2
We have the direct formula =
$(a-b+c)^2$ = $a^2+b^2+c^2-2 a b-2 b c+2 c a $