Question

已知2的10次方=a²=4的b次方,化简(a/4+b/5)(a/4－b/5)－(a/4+b/5)²,

Answer 1

2的10次方=a²=4的b次方,a=2的5次方=32,b=5.

(a/4+b/5)(a/4－b/5)－(a/4+b/5)²=(8+1)(8-1)-(8+1)²=63-81=-18