Question

(1+(a-b)分之2b)的平方*(1-(a+b)分之2b)的平方

Answer 1

原式=[(a-b+2b)/(a-b)]²[(a+b-2b)/(a+b)]²

=[(a+b)/(a-b)]²[(a-b)/(a+b)]²

=[(a+b)/(a-b)×(a-b)/(a+b)]²

=1²

=1