Amos purchased x pairs of shoes for $400. (a) Find, in terms of x, the price of one pair of shoes.
(b) If each pair of shoes cost $25 less, he could have bought eight more pairs of shoes using the same amount of money. (i) Form an equation in x and show that it reduces to x² +8x-128=0. d
(ii) Solve the equation x² +8x-128= 0 and hence, find the price of one pair of shoes.​