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Question
विस्तार करा.
(9x − 5t) (9x + 3t)
Sum
Solution
(9x − 5t) (9x + 3t)
= (9x)2 + {(−5t) + (3t)} (9x) + (−5t) × (3t)
= 81x2 + (−2t) (9x) − 15t2
= 81x2 − 18xt − 15t2
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