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प्रश्न
Use suitable identity to find the following product:
(3 – 2x) (3 + 2x)
उत्तर
By using the identity (x + y)(x – y) = x2 – y2,
(3 – 2x) (3 + 2x) = (3)2 – (2x)2
= 9 – 4x2
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