Question

For f(x) = -x -7, find f(-5)
How would I solve this?

Answer 1

just replace the x in -x - 7 by -5 and work it out.

f(-5) means 'f(x) when you replace x in f(x) by -5'

Answer 2

f(-5) = -(-5) - 7 = ?

Answer 3

remember - * - = +

Answer 4

-(-5) is the same as -1*-5

Answer 5

Oh okay, thanks!