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Solution
A coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression. Eg :Â In $$ax^2$$, coefficient is $$a$$
Expression : $$(x + 9)(6 - 4x)$$
= $$6x - 4x^2 + 54 - 36x$$
= $$-4x^2 - 30x + 54$$
$$\therefore$$ Coefficient of $$x^2$$ = -4
=> Ans - (B)
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