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प्रश्न
Use a formula to multiply of (2t – 5)(2t + 5)
बेरीज
उत्तर
We use the formula: (x - a)(x + a) = x2 - a2
(2t – 5)(2t + 5)
= (2t)2 - (5)2
= 4t2 - 25
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