你好：
6x^4+5x^3-38x^2+5x+6
=(6x^4+5x^3-39x^2)+(x^2+5x+6)
=x^2(6x^2+5x-39)+(x+2)(x+3)
=x^2(x+3)(6x-13)+(x+2)(x+3)
=(x+3)(6x^3-13x^2+x+2)
=(x+3)(6x^3-13x^2+2x-x+2)
=(x+3)[x(6x^2-13x+2)-(x-2)]
=(x+3)[x(x-2)(6x-1)-(x-2)]
=(x+3)[(x-2)(6x^2-x-1)]
=(x+3)(x-2)(2x-1)(3x+1)
a^4+2a^3b+3a^2b^2+2ab^3+b^4
=(a^4+b^4+a^2b^2)+2ab(a^2+ab+b^2)
=[(a^2+b^2)^2-a^2b^2]+2ab(a^2+ab+b^2)
=(a^2+ab+b^2)(a^2-ab+b^2)+)+2ab(a^2+ab+b^2)
=(a^2+ab+b^2)^2
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