IBPS RRB PO Mains 13 Oct 2019 Paper

Given below are two quantities named A and B. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose among the possible answers.
Find the value of x.
Quantity A: x^{4 + a} × x^{4 – a} = x^{2 + a} × x^{2 – a}
Quantity B: 4x² – 4x + 1 = 0