1、X^2-Y^2=(X+Y)(X-Y)2、4X^2-4Y^2=(2X+2Y)(2X-2Y)3、X^2-2XY+Y^2=(X-Y)*(X-Y)4、2X^2-3X+1=(2X-1)(X-1)5、3Y^-5Y+2=(3Y-2)(Y-1)6、7X^2-8X+1=(7X-1)(X-1)7、3X^2+...
16.下列各式x3-x2-x+1,x2+y-xy-x,x2-2x-y2+1,(x2+3x)2-(2x+1)2中,不含有(x-1)因式的有[]A.1个B.2个C.3个D.4个17.把9-x2+12xy-36y2分解因式为[]A.(x-6y+3)(x-6x-3)B.-(x-6y+3)(x...
24.8-2x2=2(2+x)(2-x)25.x2-x+14=整数内无法分解26.9x2-30x+25=(3x-5)^227.-20x2+9x+20=(-4x+5)(5x+4)28.12x2-29x+15=(4x-3)(3x-5)29.36x2+39x+9=3(3x+1)(4x+...
1.因式分解3a^3b^2c-6a^2b^2c^2+9ab^2c^3=3ab^2c(a^2-2ac+3c^2)2.因式分解xy+6-2x-3y=(x-3)(y-2)3.因式分解x^2(x-y)+y^2(y-x)=(x+y)(x-y)^24.因式分解2x^2-(a-2b...
一、填空题(10×3'=30')1、计算3×103-104=___2、分解因式x3y-x2y2+2xy3=xy(___)3、分解因式–9a2+=___4、分解因式4x2-4xy+y2=___5、分解因式x2-5y+xy-5x=___6、当k=___时,二次三项式x...
解:=(x^3-x^2)+(x-1)=x^2(x-1)+(x-1)=(x-1)(x^2+1)3、x2-x-y2-y解:=(x2-y2)-(x+y)=(x+y)(x-y)-(x+y)=(x+y)(x-y-1)4、bc(b+c)+ca(c-a)-ab(a+b)=bc(c-a+a...
可能为正数或负数或零二、解答题:分解因式:(1)(ab+b)2��(a+b)2(2)(a2��x2)2��4ax(x��a)2(3)7xn+1��14xn+7xn��1(n为不小于1的整数)答案:一、选择题:1.B说明:右边...
一、填空题1、因式分解:9x2-1=___,4x2-4x+1=___.a4-b4=___,an+2-an=___2、多项式x2+mx+36是一个完全平方式,则m=___.3、多项式x2+ax+b可以因式分解成(x-1)(x+3)则a=___,...
20.分解因式:(1)ax2y2+2axy+2a(2)(x2-6x)2+18(x2-6x)+81(3)–2x2n-4xn21.将下列各式分解因式:(1);(2);(3);22.分解因式(1);(2);23.用简便方法计算:(1)57.6...
41.因式分解2ax2-3x+2ax-3=。42.因式分解9x2-66x+121=。43.因式分解8-2x2=。44.因式分解x2-x+14=。45.因式分解9x2-30x+25=。46.因式分解-20x2+9x+20=。47.因式分解12x2-29...