Final answer:
The expression 2(x-4)+3x-x^2 equals -2 when x=3.
Step-by-step explanation:
To evaluate the expression 2(x-4)+3x-x^2 for x=3, we first need to replace every 'x' in the expression with the value 3:
2(3-4) + 3*3 - (3)^2
After simplifying this, we get:
2*-1 + 9 - 9
This simplifies to -2 + 9 - 9 which equals -2.
So when x=3, the expression 2(x-4)+3x-x^2 evaluates to -2.
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