Math question 4! Thanks if you help

pythagoras theorem

height ladder can reach on the wall = side a or b

13 feet =  hyp

5 feet = side a or b (you choose which one it is)(but the equation still works                     the same)

13^2-5^2 = 144

√144 = 12

= 0

Step-by-step explanation:

by using reminder theorem,

let, x - 1 = 0

then,

x = 1

plag in

1^4 + 1^2 - 2(1)^2 + 1 + 1

1 + 1 - 4 + 2

2 - 4 + 2

2 - 2

= 0

that's what I think.