(p - q)^2 = p^2 - ? + q^2
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Answer:(p
2
−q
2
)(p
2
+q
2
)
⇒ We know (a−b)(a+b)=a
2
−b
2
∴(p
2
−q
2
)(p
2
+q
2
)
⇒p
4
−q
4
Step-by-step explanation:
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