✨ Best Answer ✨
(3)a⁴-b⁴-a²+b²=(a²-b²)(a²+b²)-(a²-b²)
=(a²-b²)(a²+b²-1)
(4)x²-y²+5x+y+6=(x+y)(x-y)+5x+y+6
=(x+y+2)(x-y+3)
こんな感じでしょうか?
(3),(4)解き方を教えてください!
✨ Best Answer ✨
(3)a⁴-b⁴-a²+b²=(a²-b²)(a²+b²)-(a²-b²)
=(a²-b²)(a²+b²-1)
(4)x²-y²+5x+y+6=(x+y)(x-y)+5x+y+6
=(x+y+2)(x-y+3)
こんな感じでしょうか?
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