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Question

Simplify:

(p2 + q2) - (q2 - r2) - (r2 + p2)


A

3

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B

1

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C

0

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D

2

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Solution

The correct option is C

0


(p2 + q2) - (q2 - r2) - (r2 + p2)

= (p2 - p2) + (q2 - q2) + (r2 - r2)

= 0


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