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प्रश्न
Multiply: (6x - 2y)(3x - y)
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उत्तर
(6x - 2y)(3x - y)
⇒ 6x (3x - y) - 2y (3x - y)
⇒ 18x2 - 6xy - 6xy + 2y2
⇒ 18x2 - 12xy + 2y2
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