Given quadratic equation : 
Let us apply standard quadratic form 
We know, quadratic formula

a = 4
b = 2
c= -1
Now we plug in all the values in quadratic formula
.
<h3>The above one is the substitution of values of a,b,c in quadratic formula.</h3>
C the third one
Just plug in each answer givin into both equations untill both fit in.
I'm sorry I really don't know I'm not really good with math that's why I got them brainly for other people's help because I really not that cool math and I'm homeschooled
2*(n-55)=3*(n+8.8)
2n-110=3n+26.4
-136.4=n