Factorise p⁴-3p²q²+9q⁴
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Answer:
P^4 - 9p^2q^2- 6p^2q^2 + 9p^4
(P^4 - 9p^2q^2) - (6p^2q^2 + 9p^4)
P2( p2- 9q2) - 3p2(2q2 +3p2)
(P2 - 3p2)-(p2- 9q2)
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