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Question
Expand the following, using suitable identities.
`(4/5p + 5/3q)^2`
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Solution
We have,
`(4/5p + 5/3q)^2 = (4/5p)^2 + (5/3q)^2 + 2 xx 4/5p xx 5/3q` ...[Using the identity, (a + b)2 = a2 + b2 + 2ab]
= `16/25 p^2 + 25/9 q^2 + 8/3 pq`
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