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प्रश्न
Multiply: (2x + 3y)(2x + 3y)
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उत्तर
(2x + 3y)(2x + 3y)
⇒ 2x (2x + 3y) + 3y(2x + 3y)
⇒ 4x2 + 6xy + 6xy + 9y2
⇒ 4x2 + 12xy + 9y2
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