Question 6,10
Q.6. In the formula ; r = x 2 + y 2 ; make x as the subject.
Q.10. Factorise: p 3 - p 2 q 2 - p q + q 3 .

Dear student
We have,p3-p2q2-pq+q3=p2p-q2-qp-q2=p2-qp-q2
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