分解因式.及化简求值.2
问题描述：
分解因式.及化简求值.2
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⑥(x+1)(x^2-x+1)-1-y^3
⑦(-27a^3)+64b^3
⑧(x^4)-(x^2)+8x-16
⑨(x^4)-(4x^2)+3
⑩(a^8)+(a^4)-2
答
⑥(x+1)(x^2-x+1)-1-y^3=x^3-y^3=(x-y)(x^2+xy+y^2)⑦(-27a^3)+64b^3=(4b-3a)(16b^2+12ab+9a^2)⑨(x^4)-(4x^2)+3=(x^2-1)(x^2-3)⑩(a^8)+(a^4)-2 =(a+1)(a-1)(a^2+1)(a^4+2)