Question

数学题目？

,

Answer 1

平方差公式：x＾2-y＾2=(x+y)(x-y)=12
已知：x+y=6
x-y=12÷6=2

Answer 2

平方差公式
1.
x-y=(x²-y²)/(x+y)=12/6=2
2.
(a^4+b^4)(a²+b²)(a+b)(a-b)
=(a^4+b^4)(a²+b²)(a²-b²)
=(a^4+b^4)(a^4-b^4)
=a^8-b^8