Question

Find the value of p3q3 - 9p3q3 - 9 p2q2 + 20pq for p =3, q=1

Answer 1

PUT p=3 , q=1

(3)^3 (1)^3 - 9(3)^2(1)^2 + 20 ×3×1

27×1 - 9× 9× 1 +20 ×3

27 -81 +60

87-81

6

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