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Question

The result obtained on subtracting the product of 2x and (x - 3y) from (5x + 3y) and (2y + 1) is ____.


A

16xy + 6y2 - 2x2 + 5x + 3

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B

16xy + 6y2 - 2x2 + 5x - 3y

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C

16xy + 6y2 - 2x2 + 5x + 3y

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D

16xy + 6y2 - 2x2 + 5x

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Solution

The correct option is C

16xy + 6y2 - 2x2 + 5x + 3y


(5x + 3y)(2y + 1) - 2x(x -3y)

=10xy + 5x +6y 2 +3y -2x2 + 6xy

=16xy + 6y2 - 2x2 + 5x + 3y


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