I need help on this one!! Geometry please show work

The table respent two linear functions the equation respented by the first tables is given

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0