Question

What is g(k+1)=x^2-4x

Answer 1

g(k + 1) = k² - 2k - 3

Explanation:

Step 1: Plug in (k + 1) in for x

g(k + 1) = (k + 1)² - 4(k + 1)

Step 2: FOIL

g(k + 1) = k² + 2k + 1 - 4(k + 1)

Step 3: Distribute

g(k + 1) = k² + 2k + 1 - 4k - 4

Step 4: Combine like terms

g(k + 1) = k² - 2k - 3