⑴xy²-4x=x(y+2)(y-2)⑵x²-9=(x-3)(x+3)⑶x²-4=(x-2)(x+2)⑷x³y-2x²y²+xy³=xy(x-y)(x-y)⑸2x²-12x+18=2(x-3)(x-3)⑹xy²-4x=x(y-2)(y+2)⑺x²y-4y=y(x-2)(x+2)...