Question

What is n^2 -5n if n=n-4​

Answer 1

Answer:

n^2 - 5n = -12

Step-by-step explanation:

so

4^2 = 8

and

5*4 = 20

8-20 = -12

Answer 2

Answer:

$n^{2}-13n+36$

Step-by-step explanation:

$n^{2} -5n\ -> we\ make\ substitution\ n-4\ instead\ of\ n\\(n-4)^{2} - 5(n-4) = n^{2} + 16 - 8n-5n+20 = n^{2}-13n+36$