2x^4-16x^2+32 3m^-6mn+3n^2 3a^3+24 a^2-b^2+2bc-c^2 因式分解的理由也要
问题描述:
2x^4-16x^2+32 3m^-6mn+3n^2 3a^3+24 a^2-b^2+2bc-c^2 因式分解的理由也要
答
2x^4-16x^2+32 =2(x^4-8x²+16)=2(x²-4)²=2(x+2)²(x-2)²3m^-6mn+3n^2 =3(m²-2mn+n²)=3(m-n)²3a^3+24 =3(a³+8)=3(a+2)(a²-2a+4)a^2-b^2+2bc-c^2=a²-(b²...