Question

提取公因式的详细步骤

谢谢哪位学霸，思路和步骤，最好写在纸上发照片啦

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Answer 1

x^4 + 6 x^2 + 25 =x ^4 + 10 x ^ 2 + 25 - 4 x ^ 2
= (x^2 + 5)^2 - 4 x^2
=(x ^ 2-2 x + 5)(x^2 + 2x +5)

3 x^4 + 4 x^2 + 28x +5 = (3 x ^4 -6 x^2 +15x) + (6 x^3 - 12 x^2 +30x） + （x^2 - 2x + 5)
= (x ^2 - 2x + 5)(3 x^2 +6x +1)