7 + 28n + 4
28n + (7 + 4)
28n + 11
I don’t understand the question so I answer in two ways
If I am understanding the question, and assuming the living room is a rectangle, then the border should be 80 ft
We have 4(x^2 - 2x + 4) - 7 = 4x^2 - 8x + 16 - 7 = 4x^2 - 8x + 9;
So, 4x^2 - 8x + 9 = <span>ax^2+bx+c
;
The value of b is -8.</span>
