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प्रश्न
Use the direct method to evaluate the following products :
(3x – 2y) (2x + y)
मूल्यांकन
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उत्तर
(3x – 2y) (2x + y) = (3x × 2x) + (3x × y) + (−2y × 2x) + (−2y × y)
= 6x2 + 3xy − 4xy − 2y2
= 6x2 − xy − 2y2
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