✨ 最佳解答 ✨
(x^2 + 2x + 4)(x^2 + 2x - 6) + 21
= (A + 4)(A - 6) + 21
= A^2 - 2A -3
= (A - 3)(A + 1)
= (x^2 + 2x - 3)(x^2 + 2x + 1)
= (x + 3)(x - 1)(x + 1)^2
✨ 最佳解答 ✨
(x^2 + 2x + 4)(x^2 + 2x - 6) + 21
= (A + 4)(A - 6) + 21
= A^2 - 2A -3
= (A - 3)(A + 1)
= (x^2 + 2x - 3)(x^2 + 2x + 1)
= (x + 3)(x - 1)(x + 1)^2
看了這個問題的人
也有瀏覽這些問題喔😉
謝謝你❤