The expression 3(1)−4(−2) can be simplified using the order of operations (PEMDAS) as follows:
3(1) - 4(-2)
= 3 - (-8) (Note that -4(-2) = 8)
= 3 + 8
= 11
The expression 3 f (1) − 4 g (−2) involves two functions f and g, and we are given the input values 1 and -2 for these functions, respectively. Without knowing the actual functions f and g, we cannot evaluate this expression. We would need to know the specific formulas for f and g, or be given a table of values for these functions, in order to calculate the result.