To simplify the expression, we can start by multiplying -2 by each term inside the parentheses:
-2(x/2 - 7) = -2 * (x/2) -2 * (-7) = -x - (-14) = -x + 14
Therefore, the expression becomes:
(-x + 14)(x + 6) + 3x
Expanding the expression using distributive property:
= -x(x + 6) + 14(x + 6) + 3x
= -x^2 - 6x + 14x + 84 + 3x
Combining like terms:
= -x^2 + 11x + 84 + 3x
= -x^2 + 14x + 84
-2(x/2 -7) (x + 6) + 3x
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