Question

A function, f(x) is defined by f(x) = -x^2 + 0.5x -5. what is the value of f(-5)

Answer 1

To solve this, you substitute -5 everywhere you see x so the expression would be...

- (-5)^2 + .5(-5) - 5 ----> Simplify with order or operations
P arenthesis
E xponents
M ultiplication
D ivision
A ddition
S ubtraction

- (25) - 2.5 - 5

-25 - 2.5 - 5

-32.5