What is the value of $a^2+b^2+c^2-2 a b-

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

What is the value of $a^2+b^2+c^2-2 a b-2 b c+2 c a ?$

Options:

$(2 a+b+c)^2$

$(a-b+c)^2$

$(a-b-2 c)^2$

$(a+2 b-c)^2$

Correct Answer:

$(a-b+c)^2$

Explanation:

We have the direct formula =

$(a-b+c)^2$ = $a^2+b^2+c^2-2 a b-2 b c+2 c a $