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-2ab2+4a2b=2ab(-b+2a) 3m(a-b)-9n(b-a)=3(a-b)(m+3n) -5ab+15a2bx+25ab3y=-5ab(-3ax-5b2y); 3ay2-6ay-3a=3a(y2-2y-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)
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)
x2﹣x=x(x﹣1) a(a﹣b)=a2﹣ab (a+3)(a﹣3)=a2﹣9 x2﹣2x+1=x(x﹣2)+1
a(b+3)2 a(b+3)(b﹣3) a(b﹣4)2 a(b﹣3)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)