Final answer:
The value of expression 12x^4−14x^3 for x=2 is 80. None of the options are correct.
Step-by-step explanation:
To evaluate the expression 12x^4 - 14x^3 for x = 2, we substitute the value of x into the expression and simplify.
Substituting x = 2:
12(2)^4 - 14(2)^3
Simplifying:
12(16) - 14(8)
192 - 112
Calculating the subtraction:
80
Therefore, the value of 12x^4 - 14x^3 for x = 2 is 80. Hence none of the options are true.