因式分解.x²y-2xy²+3xy.x²-﹙x+b﹚².x﹙x-3﹚-y﹙3-x﹚.7y﹙x-3y﹚²-2﹙3y-x﹚³.-m²-m-¼..﹙x+1﹚﹙x-1﹚-8.25﹙a-b﹚²+10﹙a-b﹚+1.-2x⁴+8x².

问题描述:

因式分解.x²y-2xy²+3xy.x²-﹙x+b﹚².x﹙x-3﹚-y﹙3-x﹚.
7y﹙x-3y﹚²-2﹙3y-x﹚³.-m²-m-¼..﹙x+1﹚﹙x-1﹚-8.
25﹙a-b﹚²+10﹙a-b﹚+1.-2x⁴+8x².

x²y-2xy²+3xy=xy(x-2y+3)x²-﹙x+b﹚²=(x+x+b)(x-x-b)=-b(2x+b)x﹙x-3﹚-y﹙3-x﹚=x(x-3)+y(x-3)=(x-3)(x+y)7y﹙x-3y﹚²-2﹙3y-x﹚³=7y(x-3y)²-2(x-3y)²=(x-3y)...