Answer:
search it up please :)
Step-by-step explanation:
Answer:
(x - 9)(x - 9)
Step-by-step explanation:
<em>Hey there!</em>
Well to factor,
x^2-18x+81
we need to figure out what times what equal 81 and adds together to get -18.
-9*-9 = 81
-9 + -9 = -18
x*x = x^2
Factored - (x - 9)(x - 9)
<em>Hope this helps :)</em>
1. cos O = 3/5
cos 2O = 2 cos^2 O - 1 = 2* 9/25 - 1 = 18/25 - 1 = -7/25
The picture shows the answer I got!
Also! For the future, I use a site called
math way and it is great for problems like these.