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x2-9+6x=(x+3)(x-3)+6x (x+5)(x-2)=x2+3x-10 x2-8x+16=(x-4) 2 -6a2b=-3a﹒2ab
12abc-9a2b2=3abc(4-3ab) 3x2y-3xy+6y=3y(x2-x+2y) -a2+ab-ac=-a(a-b+c) x2y+5xy-y=y(x2+5x)
ab(a-b)-a(b-a)=-a(b-a)(b+1); 6(m+n)2-2(m+n)=(2m+n)(3m+n+1) 3(y-x)2+2(x-y)=(y-x)(3y-3x+2); 3x(x+y)2-(x+y)=(x+y)2(2x+y)
12abc-9a2b2c=3abc(4-3ab) 3x2y-3xy+6y=3y(x2-x+2y) -a2+ab-ac=-a(a-b+c) x2y+5xy+y=y(x2+5x+1)
x(x﹣2)+1=(x﹣1)2 a2b+ab3=ab(a+b2) x2+2xy+1=x(x+2y)+1 a2b2﹣1=(ab+1)(ab﹣1)
x2﹣x=x(x﹣1) a(a﹣b)=a2﹣ab (a+3)(a﹣3)=a2﹣9 x2﹣2x+1=x(x﹣2)+1
ab(a-b)-a(b-a)=-a(b-a)(b+1) 6(m+n)2-2(m+n)=(2m+n)(3m+n+1) 3(y-x)2+2(x-y)=(y-x)(3y-3x+2) 3x(x+y)2-(x+y)=(x+y)2(2x+y)
a2b+7ab-b=b(a2+7a) 3x2y-3xy+6y=3y(x2-x+2) 8xyz-6x2y2=2xyz(4-3xy) -2a2+4ab-6ac=-2a(a-2b-3c)
6xy2=3xy·2y (a-2b)(a+2b)=a2-4b2 3x2-6x-1=3x(x-2)-1 a2+4ab+4b2=(a+2b)2
x2﹣9+6x=(x+3)(x﹣3)+6x (x+5)(x﹣2)=x2+3x﹣10 x2﹣8x+16=(x﹣4)2 6ab=2a•3b
x2-6x+9=(x-3)2 (x+3)(x-1)=x2+2x-3 x2-9+6x=(x+3)(x-3)+6x 6ab=2a·3b
x2-x=x(x-1) a(a-b)=a2-ab (a+3)(a-3)=a2-9 x2-2x+1=x(x-2)+1
12abc-9a2b2=3abc(4-3ab) 3x2y-3xy+6y=3y(x2-x+2y) -a2+ab-ac=-a(a-b+c) x2y+5xy-y=y(x2+5x)