(06.05) how can 2x2 = x2 + 4x + 8 be set up as a system of equations?

Starting with the given 2x^2 = x^2 + 4x + 8, re-introduce y by writing the following:

y = 2x^2

y = x^2 + 4x + 8

This is the desired system of equations.

Please use " ^ " to denote exponentiation.

the right system of equations to describe the situation would

be on the form:

x1 = 8000 + y1*t

and

x2 = 8000 + y2*t

where x1 and x2 represents the total money of imogene and her

friend respectively at the end of t years.

now for the value of amount earned, y1 and y2:

y1=8000*0.08

y2=2000*√(t-2)