$- 15 (- x^{2} y z^{2} + 2 p q^{2} - 3 m n) =$

15 (x^{2} y z^{2} - 2 p q^{2} + 3 m n)

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15 (x^{2} y z^{2} + 2 p q^{2} - 3 m n)

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15 x^{2} y z^{2} + 30 p q^{2} + 45 m n

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15 x^{2} y z^{2} - 30 p q^{2} - 45 m n

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Solution

The correct option is B $15 (x^{2} y z^{2} - 2 p q^{2} + 3 m n)$
$- 15 (- x^{2} y z^{2} + 2 p q^{2} - 3 m n)$
$= - 15 (- x^{2} y z^{2}) - 15 (2 p q^{2}) - 15 (- 3 m n)$
$= 15 x^{2} y z^{2} - 30 p q^{2} + 45 m n$
$= 15 (x^{2} y z^{2} - 2 p q^{2} + 3 m n)$

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