Question

If f(n) = n^2 - 2n, which of the following options are correct?

Select all that apply.

f(2) = 0
f(1) = 3
f(-4) = 24
f(5) = 35
f(-2) = 0

Answer 1

f(2)=0 and f(-4)=24 are correct

Explanation:

Answer 2

Options f(2)=0 and f(-4)=24 are correct

Explanation:

Given function
`f(n)=n^2-2n.`

When you need to find f(a), you just substitute a instead of n into the function expression. So,

`f(2)=2^2-2\cdot 2=4-4=0\\ \\f(1)=1^2-2\cdot 1=1-2=-1\\ \\f(-4)=(-4)^2-2\cdot (-4)=16+8=24\\ \\f(5)=5^2-2\cdot 5=25-10=15\\ \\f(-2)=(-2)^2-2\cdot (-2)=4+4=8`

So, options f(2)=0 and f(-4)=24 are correct.