Kelsie wanted to find the values of x in the equation −x^2−48=0. Dennis tells her that the answers can be written in the form of x=±4i√a, where a represents a whole number. Enter the value of a.

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6

well, if you graph the linear equation using intercepts or other methods, and the line is straight, then the equation is linear

the question is missing some info.