Simplify the expression

An equation is shown. 
(2x - 3) + [4x(3x + 2)]
Which expression is equivalent to the given expression?
A,.)  9x - 1
B.)  14x + 5
C.)  12x² + 2x - 1
D.)  12x² + 10x - 3

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(2x - 3) + [4x(3x + 2)]
= 2x - 3 + (12x² + 8x)   {removed first set of parentheses and used distributive property inside brackets}
= 2x - 3 + 12x² + 8x   {removed parentheses}
= 12x² + 10x - 3   {combined like terms}

D.)  12x² + 10x - 3

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