Factors of the term $- 18 {a b}^{2}$ in the expression $15 a^{2} b - 18 {a b}^{2}$ are

- 18, a, b

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15 a^{2} b - 18 {a b}^{2}

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5, a

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None of these

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Solution

The correct option is A $- 18, a, b$
$- 18 {a b}^{2} = - 18 \times a \times b \times b$
$∴$ The factors of $- 18 {a b}^{2}$ are $- 18, a, b$

So, option A is correct.

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