4x + 5 + 5x + 6 = 29. Whats X?

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

Which expression gives you the distance between the points (5,1)and(9,-6)

Precalculus question, image attached.