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Q : 5        (a) Add:  p(p-q),q(q-r) and r(r-p)

Answers (1)

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(a)First we will solve each brackets individually.

    p(p-q) = p^2 - pq;                  q(q-r) = q^2 - qr;                     r(r-p) = r^2 - rp

Addind all we get :             p^2 - pq + q^2 - qr + r^2 - rp

                                          = p^2 + q^2 + r^2 -pq-qr-rp

Posted by

Devendra Khairwa

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