Question

已知(a+b)的x次方=2,(a-b)的x次方=3 求[(a+b)(a-b)]的2x次方的值

Answer 1

[(a+b)(a-b)]的2x次方

=[(a+b)的x次方*(a-b)的x次方]的2次方

=[2*3]的2次方

=36