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Choose the correct simplification of \((6x - 5)(2x^2 - 3x - 6)\).

A. \(12x^3 + 28x^2 + 21x + 30\)
B. \(12x^3 - 28x^2 - 21x + 30\)
C. \(12x^3 + 28x^2 - 21x + 30\)
D. \(12x^3 - 28x^2 - 21x - 30\)

Answer :

The simplification of the expression (6x - 5)(2x^2 - 3x -6) is 12x^3 - 28x^2 - 21x + 30.

According to the given question.

We have an expression

(6x - 5)(2x^2 - 3x -6)

To simplify the above expression we will use the distributive law.

Distributive law relate the operations of multiplication and addition, stated symbolically as a(b + c) = ab + ac.

Therefore,

(6x - 5)(2x^2 - 3x -6)

= 6x(2x^2 - 3x - 6) -5(2x^2 -3x - 6) (by distributive law)

= 12x^3 - 18x^2 - 36x - 10x^2 + 15x + 30

= 12x^3 - 28x^2 - 21x + 30

Hence, the simplification of the expression (6x - 5)(2x^2 - 3x -6) is 12x^3 - 28x^2 - 21x + 30.

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