4x^3-4x^2y-(x-y)因式分解
问题描述:
4x^3-4x^2y-(x-y)因式分解
2.a^3+1/81(b^3) 3.x(x+4)+4
答
4x^3-4x^2y-(x-y)
=4x²(x-y)-(x-y)
=(x-y)(4x²-1)
=(x-y)(2x+1)(2x-1)a^3+1/81(b^3) x(x+4)+4 x的绝对值=(x-1)^0,x=?a^3+1/81(b^3)=(a+1/2b)(a²-1/2ab+1/4b²)x(x+4)+4=x²+4x+4=(x+2)²x的绝对值=(x-1)^0,x=?,谢谢这是最后一题,好的追加分!!!|x|=1x=1或-1但底数x-1≠0,即x≠1所以x=-1这是a^3+1/81(b^3),是1/81!!!a^3+1/81(b^3)=(a+1/81^(1/3)b)(a²-1/81^(1/3)ab+1/81^(2/3)b²)