How do you evaluate #f(x)=2|-x+3|-9x# for x=-4?

1 Answer
Mar 31, 2017

Answer:

See explanation.

Explanation:

To calculate the value of an expression for a specified value of a variable you substitute the given value for all occurences of the variable and then simplify the expression:

#f(x)=2xx|-x+3|-9x#

So

#f(-4)=2xx|-(-4)+3|-9*(-4)=2xx|4+3|-9*(-4)=#
#=2xx|7|+36=14+36=50#