分解下列因式:(4) 4(x-y)的2次幂-4(x-y)+1
问题描述:
分解下列因式:(4) 4(x-y)的2次幂-4(x-y)+1
答
4(x-y)²-4(x-y)+1
=[2(x-y)]²-4(x-y)+1
=[2(x-y)-1]²
答
4(x-y)²-4(x-y)+1
=[2(x-y)-1]²
=(2x-2y-1)²