因式分解 x^4+64x 25(x+y)^2-16(x-y)^2 p^2(p+q)^2-q^2(p-q)^2 (a+b+c)^2-(a-b-c)^2还有x^2-4y^2+x+2yx^2-6x+9-y^2a^3x^2-c^3x^2-a^3y^2+c^3y^2x^5-x^3+x^2-110a^2x+21xy^2-14ax^2-15ay^2一开始的题目x^4+64x 25(x+y)^2-16(x-y)^2 p^2(p+q)^2-q^2(p-q)^2 (a
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