(p^2 - 2q^2)^2 find the product
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(p
2
/2+2/q
2
)(p
2
/2−2/q
2
)
= (p
2
/2)
2
−(2/q
2
)
2
= p
4
/4−4/q
4
[Using, (a+b)(a−b)=a
2
−b
2
]
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