题目下列等式从左到右的变形中,属于因式分解的是（ ）A.x2−4+4x=(x+2)(x−2)+4xx^{2}-4+4x=\left(x+2\right)\left(x-2\right)+4xx2−4+4x=(x+2)(x−2)+4xB.(x+3)(x−1)=x2+2x−3(x+3)\left(x-1\right)=x^{2}+2x-3(x+3)(x−1)=x2+2x−3C.x2−6x=x(x−6)x^{2}-6x=x\left(x-6\right)x2−6x=x(x−6)D.a(x−y)=ax−aya\left(x-y\right)=ax-aya(x−y)=ax−ay知识点：提公因式法章节：数与式 / 因式分解
