Question

ヾ(〃^∇^)ﾉ

這題要用什麼方法因式分解？
求詳解，謝謝你🙂
我看了Hint後還是不清楚

試因式分解 (福士+p2)(02 十人2一12y Gin@

了  (銜:歷+ 補淪k衣開)般 時

Answer 1

Call me Bravo

For your reference

Answer 2

Cobe

k(k+y²)-12y⁴
=k²+ky²-12y⁴
=(k+y²/2)²-12y⁴-y⁴/4
=(k+y²/2)²-［12y⁴+y⁴/4］
=(k+y²/2)²-［12+1/4］y⁴
=(k+y²/2)²-［49/4］y⁴
=(k+y²/2)²-(7y²/2)²

by the formula:a²-b²=(a+b)(a-b)
→(k+y²/2)²-(7y²/2)²
=(k+4y²)(k-3y²)
=(x²+xy+5y²)(x²+xy-2y²)